diff --git a/yarn-project/aztec-node/src/aztec-node/server.ts b/yarn-project/aztec-node/src/aztec-node/server.ts
index fa7904296cc..c1c56911834 100644
--- a/yarn-project/aztec-node/src/aztec-node/server.ts
+++ b/yarn-project/aztec-node/src/aztec-node/server.ts
@@ -58,7 +58,7 @@ import { type ContractArtifact } from '@aztec/foundation/abi';
 import { AztecAddress } from '@aztec/foundation/aztec-address';
 import { padArrayEnd } from '@aztec/foundation/collection';
 import { type Logger, createLogger } from '@aztec/foundation/log';
-import { Timer } from '@aztec/foundation/timer';
+import { DateProvider, Timer } from '@aztec/foundation/timer';
 import { type AztecKVStore } from '@aztec/kv-store';
 import { openTmpStore } from '@aztec/kv-store/lmdb';
 import { SHA256Trunc, StandardTree, UnbalancedTree } from '@aztec/merkle-tree';
@@ -136,10 +136,12 @@ export class AztecNodeService implements AztecNode {
       telemetry?: TelemetryClient;
       logger?: Logger;
       publisher?: L1Publisher;
+      dateProvider?: DateProvider;
     } = {},
   ): Promise<AztecNodeService> {
     const telemetry = deps.telemetry ?? new NoopTelemetryClient();
     const log = deps.logger ?? createLogger('node');
+    const dateProvider = deps.dateProvider ?? new DateProvider();
     const ethereumChain = createEthereumChain(config.l1RpcUrl, config.l1ChainId);
     //validate that the actual chain id matches that specified in configuration
     if (config.l1ChainId !== ethereumChain.chainInfo.id) {
@@ -152,7 +154,8 @@ export class AztecNodeService implements AztecNode {
 
     // we identify the P2P transaction protocol by using the rollup contract address.
     // this may well change in future
-    config.transactionProtocol = `/aztec/tx/${config.l1Contracts.rollupAddress.toString()}`;
+    const rollupAddress = config.l1Contracts.rollupAddress;
+    config.transactionProtocol = `/aztec/tx/${rollupAddress.toString()}`;
 
     // now create the merkle trees and the world state synchronizer
     const worldStateSynchronizer = await createWorldStateSynchronizer(config, archiver, telemetry);
@@ -167,7 +170,7 @@ export class AztecNodeService implements AztecNode {
     // start both and wait for them to sync from the block source
     await Promise.all([p2pClient.start(), worldStateSynchronizer.start()]);
 
-    const validatorClient = await createValidatorClient(config, config.l1Contracts.rollupAddress, p2pClient, telemetry);
+    const validatorClient = await createValidatorClient(config, rollupAddress, { p2pClient, telemetry, dateProvider });
 
     // now create the sequencer
     const sequencer = config.disableValidator
diff --git a/yarn-project/end-to-end/package.json b/yarn-project/end-to-end/package.json
index c51b89150bb..4a31d3e2ee1 100644
--- a/yarn-project/end-to-end/package.json
+++ b/yarn-project/end-to-end/package.json
@@ -98,7 +98,6 @@
   "devDependencies": {
     "0x": "^5.7.0",
     "@jest/globals": "^29.5.0",
-    "@sinonjs/fake-timers": "^13.0.5",
     "@types/jest": "^29.5.0",
     "@types/js-yaml": "^4.0.9",
     "@types/lodash.chunk": "^4.2.9",
diff --git a/yarn-project/end-to-end/src/e2e_p2p/gossip_network.test.ts b/yarn-project/end-to-end/src/e2e_p2p/gossip_network.test.ts
index afa5cdbb1cd..7a74cb96163 100644
--- a/yarn-project/end-to-end/src/e2e_p2p/gossip_network.test.ts
+++ b/yarn-project/end-to-end/src/e2e_p2p/gossip_network.test.ts
@@ -76,6 +76,7 @@ describe('e2e_p2p_network', () => {
     t.logger.info('Creating nodes');
     nodes = await createNodes(
       t.ctx.aztecNodeConfig,
+      t.ctx.dateProvider,
       t.bootstrapNodeEnr,
       NUM_NODES,
       BOOT_NODE_UDP_PORT,
diff --git a/yarn-project/end-to-end/src/e2e_p2p/p2p_network.ts b/yarn-project/end-to-end/src/e2e_p2p/p2p_network.ts
index 09d282c4f43..a218e4e7fe3 100644
--- a/yarn-project/end-to-end/src/e2e_p2p/p2p_network.ts
+++ b/yarn-project/end-to-end/src/e2e_p2p/p2p_network.ts
@@ -93,7 +93,7 @@ export class P2PNetworkTest {
    */
   public async syncMockSystemTime() {
     this.logger.info('Syncing mock system time');
-    const { timer, deployL1ContractsValues } = this.ctx!;
+    const { dateProvider, deployL1ContractsValues } = this.ctx!;
     // Send a tx and only update the time after the tx is mined, as eth time is not continuous
     const tx = await deployL1ContractsValues.walletClient.sendTransaction({
       to: this.baseAccount.address,
@@ -104,8 +104,7 @@ export class P2PNetworkTest {
       hash: tx,
     });
     const timestamp = await deployL1ContractsValues.publicClient.getBlock({ blockNumber: receipt.blockNumber });
-    timer.setSystemTime(Number(timestamp.timestamp) * 1000);
-    this.logger.info(`Synced mock system time to ${timestamp.timestamp * 1000n}`);
+    dateProvider.setTime(Number(timestamp.timestamp) * 1000);
   }
 
   static async create({
@@ -133,7 +132,7 @@ export class P2PNetworkTest {
   async applyBaseSnapshots() {
     await this.snapshotManager.snapshot(
       'add-validators',
-      async ({ deployL1ContractsValues, aztecNodeConfig, timer }) => {
+      async ({ deployL1ContractsValues, aztecNodeConfig, dateProvider }) => {
         const rollup = getContract({
           address: deployL1ContractsValues.l1ContractAddresses.rollupAddress.toString(),
           abi: RollupAbi,
@@ -203,7 +202,7 @@ export class P2PNetworkTest {
 
         // Set the system time in the node, only after we have warped the time and waited for a block
         // Time is only set in the NEXT block
-        timer.setSystemTime(Number(timestamp) * 1000);
+        dateProvider.setTime(Number(timestamp) * 1000);
       },
     );
   }
@@ -244,7 +243,7 @@ export class P2PNetworkTest {
   async removeInitialNode() {
     await this.snapshotManager.snapshot(
       'remove-inital-validator',
-      async ({ deployL1ContractsValues, aztecNode, timer }) => {
+      async ({ deployL1ContractsValues, aztecNode, dateProvider }) => {
         // Send and await a tx to make sure we mine a block for the warp to correctly progress.
         const receipt = await deployL1ContractsValues.publicClient.waitForTransactionReceipt({
           hash: await deployL1ContractsValues.walletClient.sendTransaction({
@@ -256,7 +255,7 @@ export class P2PNetworkTest {
         const block = await deployL1ContractsValues.publicClient.getBlock({
           blockNumber: receipt.blockNumber,
         });
-        timer.setSystemTime(Number(block.timestamp) * 1000);
+        dateProvider.setTime(Number(block.timestamp) * 1000);
 
         await aztecNode.stop();
       },
diff --git a/yarn-project/end-to-end/src/e2e_p2p/rediscovery.test.ts b/yarn-project/end-to-end/src/e2e_p2p/rediscovery.test.ts
index 81d069b65c7..f7a8ffbfb4a 100644
--- a/yarn-project/end-to-end/src/e2e_p2p/rediscovery.test.ts
+++ b/yarn-project/end-to-end/src/e2e_p2p/rediscovery.test.ts
@@ -46,6 +46,7 @@ describe('e2e_p2p_rediscovery', () => {
     const contexts: NodeContext[] = [];
     nodes = await createNodes(
       t.ctx.aztecNodeConfig,
+      t.ctx.dateProvider,
       t.bootstrapNodeEnr,
       NUM_NODES,
       BOOT_NODE_UDP_PORT,
@@ -72,6 +73,7 @@ describe('e2e_p2p_rediscovery', () => {
 
       const newNode = await createNode(
         t.ctx.aztecNodeConfig,
+        t.ctx.dateProvider,
         i + 1 + BOOT_NODE_UDP_PORT,
         undefined,
         i,
diff --git a/yarn-project/end-to-end/src/e2e_p2p/reex.test.ts b/yarn-project/end-to-end/src/e2e_p2p/reex.test.ts
index 10b12d4da59..be5475755c0 100644
--- a/yarn-project/end-to-end/src/e2e_p2p/reex.test.ts
+++ b/yarn-project/end-to-end/src/e2e_p2p/reex.test.ts
@@ -65,6 +65,7 @@ describe('e2e_p2p_reex', () => {
 
     nodes = await createNodes(
       t.ctx.aztecNodeConfig,
+      t.ctx.dateProvider,
       t.bootstrapNodeEnr,
       NUM_NODES,
       BOOT_NODE_UDP_PORT,
diff --git a/yarn-project/end-to-end/src/e2e_p2p/reqresp.test.ts b/yarn-project/end-to-end/src/e2e_p2p/reqresp.test.ts
index d9be627e861..fed938743d4 100644
--- a/yarn-project/end-to-end/src/e2e_p2p/reqresp.test.ts
+++ b/yarn-project/end-to-end/src/e2e_p2p/reqresp.test.ts
@@ -65,6 +65,7 @@ describe('e2e_p2p_reqresp_tx', () => {
     t.logger.info('Creating nodes');
     nodes = await createNodes(
       t.ctx.aztecNodeConfig,
+      t.ctx.dateProvider,
       t.bootstrapNodeEnr,
       NUM_NODES,
       BOOT_NODE_UDP_PORT,
diff --git a/yarn-project/end-to-end/src/e2e_p2p/upgrade_governance_proposer.test.ts b/yarn-project/end-to-end/src/e2e_p2p/upgrade_governance_proposer.test.ts
index f7ef6b05195..9499bce2eef 100644
--- a/yarn-project/end-to-end/src/e2e_p2p/upgrade_governance_proposer.test.ts
+++ b/yarn-project/end-to-end/src/e2e_p2p/upgrade_governance_proposer.test.ts
@@ -130,6 +130,7 @@ describe('e2e_p2p_governance_proposer', () => {
     t.logger.info('Creating nodes');
     nodes = await createNodes(
       { ...t.ctx.aztecNodeConfig, governanceProposerPayload: newPayloadAddress },
+      t.ctx.dateProvider,
       t.bootstrapNodeEnr,
       NUM_NODES,
       BOOT_NODE_UDP_PORT,
diff --git a/yarn-project/end-to-end/src/fixtures/setup_p2p_test.ts b/yarn-project/end-to-end/src/fixtures/setup_p2p_test.ts
index b69ae1c69e0..1d31d41ab6c 100644
--- a/yarn-project/end-to-end/src/fixtures/setup_p2p_test.ts
+++ b/yarn-project/end-to-end/src/fixtures/setup_p2p_test.ts
@@ -4,6 +4,7 @@
 import { type AztecNodeConfig, AztecNodeService } from '@aztec/aztec-node';
 import { type SentTx, createLogger } from '@aztec/aztec.js';
 import { type AztecAddress } from '@aztec/circuits.js';
+import { type DateProvider } from '@aztec/foundation/timer';
 import { type PXEService } from '@aztec/pxe';
 
 import getPort from 'get-port';
@@ -34,6 +35,7 @@ export function generatePrivateKeys(startIndex: number, numberOfKeys: number): `
 
 export function createNodes(
   config: AztecNodeConfig,
+  dateProvider: DateProvider,
   bootstrapNodeEnr: string,
   numNodes: number,
   bootNodePort: number,
@@ -46,7 +48,7 @@ export function createNodes(
     const port = bootNodePort + i + 1;
 
     const dataDir = dataDirectory ? `${dataDirectory}-${i}` : undefined;
-    const nodePromise = createNode(config, port, bootstrapNodeEnr, i, dataDir, metricsPort);
+    const nodePromise = createNode(config, dateProvider, port, bootstrapNodeEnr, i, dataDir, metricsPort);
     nodePromises.push(nodePromise);
   }
   return Promise.all(nodePromises);
@@ -55,6 +57,7 @@ export function createNodes(
 // creates a P2P enabled instance of Aztec Node Service
 export async function createNode(
   config: AztecNodeConfig,
+  dateProvider: DateProvider,
   tcpPort: number,
   bootstrapNode: string | undefined,
   accountIndex: number,
@@ -68,6 +71,7 @@ export async function createNode(
   return await AztecNodeService.createAndSync(validatorConfig, {
     telemetry: telemetryClient,
     logger: createLogger(`node:${tcpPort}`),
+    dateProvider,
   });
 }
 
diff --git a/yarn-project/end-to-end/src/fixtures/snapshot_manager.ts b/yarn-project/end-to-end/src/fixtures/snapshot_manager.ts
index 6743a7ef2c4..5581397e60c 100644
--- a/yarn-project/end-to-end/src/fixtures/snapshot_manager.ts
+++ b/yarn-project/end-to-end/src/fixtures/snapshot_manager.ts
@@ -20,11 +20,11 @@ import { startAnvil } from '@aztec/ethereum/test';
 import { asyncMap } from '@aztec/foundation/async-map';
 import { createLogger } from '@aztec/foundation/log';
 import { resolver, reviver } from '@aztec/foundation/serialize';
+import { TestDateProvider } from '@aztec/foundation/timer';
 import { type ProverNode } from '@aztec/prover-node';
 import { type PXEService, createPXEService, getPXEServiceConfig } from '@aztec/pxe';
 import { createAndStartTelemetryClient, getConfigEnvVars as getTelemetryConfig } from '@aztec/telemetry-client/start';
 
-import { type InstalledClock, install } from '@sinonjs/fake-timers';
 import { type Anvil } from '@viem/anvil';
 import { existsSync, mkdirSync, readFileSync, writeFileSync } from 'fs';
 import { copySync, removeSync } from 'fs-extra/esm';
@@ -50,7 +50,7 @@ export type SubsystemsContext = {
   proverNode?: ProverNode;
   watcher: AnvilTestWatcher;
   cheatCodes: CheatCodes;
-  timer: InstalledClock;
+  dateProvider: TestDateProvider;
 };
 
 type SnapshotEntry = {
@@ -250,7 +250,6 @@ async function teardown(context: SubsystemsContext | undefined) {
     await context.acvmConfig?.cleanup();
     await context.anvil.stop();
     await context.watcher.stop();
-    context.timer?.uninstall();
   } catch (err) {
     getLogger().error('Error during teardown', err);
   }
@@ -272,9 +271,6 @@ async function setupFromFresh(
 ): Promise<SubsystemsContext> {
   logger.verbose(`Initializing state...`);
 
-  // Use sinonjs fake timers
-  const timer = install({ shouldAdvanceTime: true, advanceTimeDelta: 20, toFake: ['Date'] });
-
   // Fetch the AztecNode config.
   // TODO: For some reason this is currently the union of a bunch of subsystems. That needs fixing.
   const aztecNodeConfig: AztecNodeConfig & SetupOptions = { ...getConfigEnvVars(), ...opts };
@@ -358,7 +354,8 @@ async function setupFromFresh(
   const telemetry = await getEndToEndTestTelemetryClient(opts.metricsPort);
 
   logger.verbose('Creating and synching an aztec node...');
-  const aztecNode = await AztecNodeService.createAndSync(aztecNodeConfig, { telemetry });
+  const dateProvider = new TestDateProvider();
+  const aztecNode = await AztecNodeService.createAndSync(aztecNodeConfig, { telemetry, dateProvider });
 
   let proverNode: ProverNode | undefined = undefined;
   if (opts.startProverNode) {
@@ -392,7 +389,7 @@ async function setupFromFresh(
     proverNode,
     watcher,
     cheatCodes,
-    timer,
+    dateProvider,
   };
 }
 
@@ -402,9 +399,6 @@ async function setupFromFresh(
 async function setupFromState(statePath: string, logger: Logger): Promise<SubsystemsContext> {
   logger.verbose(`Initializing with saved state at ${statePath}...`);
 
-  // TODO: make one function
-  const timer = install({ shouldAdvanceTime: true, advanceTimeDelta: 20, toFake: ['Date'] });
-
   // TODO: For some reason this is currently the union of a bunch of subsystems. That needs fixing.
   const aztecNodeConfig: AztecNodeConfig & SetupOptions = JSON.parse(
     readFileSync(`${statePath}/aztec_node_config.json`, 'utf-8'),
@@ -445,7 +439,8 @@ async function setupFromState(statePath: string, logger: Logger): Promise<Subsys
 
   logger.verbose('Creating aztec node...');
   const telemetry = await createAndStartTelemetryClient(getTelemetryConfig());
-  const aztecNode = await AztecNodeService.createAndSync(aztecNodeConfig, { telemetry });
+  const dateProvider = new TestDateProvider();
+  const aztecNode = await AztecNodeService.createAndSync(aztecNodeConfig, { telemetry, dateProvider });
 
   let proverNode: ProverNode | undefined = undefined;
   if (aztecNodeConfig.startProverNode) {
@@ -477,7 +472,7 @@ async function setupFromState(statePath: string, logger: Logger): Promise<Subsys
     },
     watcher,
     cheatCodes,
-    timer,
+    dateProvider,
   };
 }
 
diff --git a/yarn-project/end-to-end/src/fixtures/utils.ts b/yarn-project/end-to-end/src/fixtures/utils.ts
index b8954d38cd1..469fa70e1af 100644
--- a/yarn-project/end-to-end/src/fixtures/utils.ts
+++ b/yarn-project/end-to-end/src/fixtures/utils.ts
@@ -38,6 +38,7 @@ import {
 } from '@aztec/ethereum';
 import { startAnvil } from '@aztec/ethereum/test';
 import { retryUntil } from '@aztec/foundation/retry';
+import { TestDateProvider } from '@aztec/foundation/timer';
 import { FeeJuiceContract } from '@aztec/noir-contracts.js/FeeJuice';
 import { getVKTreeRoot } from '@aztec/noir-protocol-circuits-types';
 import { ProtocolContractAddress, protocolContractTreeRoot } from '@aztec/protocol-contracts';
@@ -225,6 +226,7 @@ async function setupWithRemoteEnvironment(
     logger,
     cheatCodes,
     watcher: undefined,
+    dateProvider: undefined,
     teardown,
   };
 }
@@ -277,8 +279,10 @@ export type EndToEndContext = {
   logger: Logger;
   /** The cheat codes. */
   cheatCodes: CheatCodes;
-  /** The anvil test watcher (undefined if connected to remove environment) */
+  /** The anvil test watcher (undefined if connected to remote environment) */
   watcher: AnvilTestWatcher | undefined;
+  /** Allows tweaking current system time, used by the epoch cache only (undefined if connected to remote environment) */
+  dateProvider: TestDateProvider | undefined;
   /** Function to stop the started services. */
   teardown: () => Promise<void>;
 };
@@ -415,7 +419,8 @@ export async function setup(
 
   const telemetry = await telemetryPromise;
   const publisher = new TestL1Publisher(config, telemetry);
-  const aztecNode = await AztecNodeService.createAndSync(config, { telemetry, publisher });
+  const dateProvider = new TestDateProvider();
+  const aztecNode = await AztecNodeService.createAndSync(config, { telemetry, publisher, dateProvider });
   const sequencer = aztecNode.getSequencer();
 
   let proverNode: ProverNode | undefined = undefined;
@@ -466,6 +471,7 @@ export async function setup(
     cheatCodes,
     sequencer,
     watcher,
+    dateProvider,
     teardown,
   };
 }
diff --git a/yarn-project/epoch-cache/src/epoch_cache.ts b/yarn-project/epoch-cache/src/epoch_cache.ts
index b0c019c6b63..1cbe315c2bb 100644
--- a/yarn-project/epoch-cache/src/epoch_cache.ts
+++ b/yarn-project/epoch-cache/src/epoch_cache.ts
@@ -7,6 +7,7 @@ import {
 import { RollupContract, createEthereumChain } from '@aztec/ethereum';
 import { EthAddress } from '@aztec/foundation/eth-address';
 import { type Logger, createLogger } from '@aztec/foundation/log';
+import { DateProvider } from '@aztec/foundation/timer';
 
 import { EventEmitter } from 'node:events';
 import { createPublicClient, encodeAbiParameters, http, keccak256 } from 'viem';
@@ -40,6 +41,7 @@ export class EpochCache extends EventEmitter<{ committeeChanged: [EthAddress[],
     initialValidators: EthAddress[] = [],
     initialSampleSeed: bigint = 0n,
     private readonly l1constants: L1RollupConstants = EmptyL1RollupConstants,
+    private readonly dateProvider: DateProvider = new DateProvider(),
   ) {
     super();
     this.committee = initialValidators;
@@ -47,10 +49,14 @@ export class EpochCache extends EventEmitter<{ committeeChanged: [EthAddress[],
 
     this.log.debug(`Initialized EpochCache with constants and validators`, { l1constants, initialValidators });
 
-    this.cachedEpoch = getEpochNumberAtTimestamp(BigInt(Math.floor(Date.now() / 1000)), this.l1constants);
+    this.cachedEpoch = getEpochNumberAtTimestamp(this.nowInSeconds(), this.l1constants);
   }
 
-  static async create(rollupAddress: EthAddress, config?: EpochCacheConfig) {
+  static async create(
+    rollupAddress: EthAddress,
+    config?: EpochCacheConfig,
+    deps: { dateProvider?: DateProvider } = {},
+  ) {
     config = config ?? getEpochCacheConfigEnvVars();
 
     const chain = createEthereumChain(config.l1RpcUrl, config.l1ChainId);
@@ -81,16 +87,20 @@ export class EpochCache extends EventEmitter<{ committeeChanged: [EthAddress[],
       initialValidators.map(v => EthAddress.fromString(v)),
       sampleSeed,
       l1RollupConstants,
+      deps.dateProvider,
     );
   }
 
+  private nowInSeconds(): bigint {
+    return BigInt(Math.floor(this.dateProvider.now() / 1000));
+  }
+
   getEpochAndSlotNow(): EpochAndSlot {
-    const now = BigInt(Math.floor(Date.now() / 1000));
-    return this.getEpochAndSlotAtTimestamp(now);
+    return this.getEpochAndSlotAtTimestamp(this.nowInSeconds());
   }
 
   getEpochAndSlotInNextSlot(): EpochAndSlot {
-    const nextSlotTs = BigInt(Math.floor(Date.now() / 1000) + this.l1constants.slotDuration);
+    const nextSlotTs = this.nowInSeconds() + BigInt(this.l1constants.slotDuration);
     return this.getEpochAndSlotAtTimestamp(nextSlotTs);
   }
 
diff --git a/yarn-project/foundation/src/timer/date.test.ts b/yarn-project/foundation/src/timer/date.test.ts
new file mode 100644
index 00000000000..55aeac96d55
--- /dev/null
+++ b/yarn-project/foundation/src/timer/date.test.ts
@@ -0,0 +1,33 @@
+import { sleep } from '../sleep/index.js';
+import { TestDateProvider } from './date.js';
+
+describe('TestDateProvider', () => {
+  let dateProvider: TestDateProvider;
+  beforeEach(() => {
+    dateProvider = new TestDateProvider();
+  });
+
+  it('should return the current datetime', () => {
+    const currentTime = Date.now();
+    const result = dateProvider.now();
+    expect(result).toBeGreaterThanOrEqual(currentTime);
+    expect(result).toBeLessThan(currentTime + 100);
+  });
+
+  it('should return the overridden datetime', () => {
+    const overriddenTime = Date.now() + 1000;
+    dateProvider.setTime(overriddenTime);
+    const result = dateProvider.now();
+    expect(result).toBeGreaterThanOrEqual(overriddenTime);
+    expect(result).toBeLessThan(overriddenTime + 100);
+  });
+
+  it('should keep ticking after overriding', async () => {
+    const overriddenTime = Date.now() + 1000;
+    dateProvider.setTime(overriddenTime);
+    await sleep(510);
+    const result = dateProvider.now();
+    expect(result).toBeGreaterThanOrEqual(overriddenTime + 500);
+    expect(result).toBeLessThan(overriddenTime + 600);
+  });
+});
diff --git a/yarn-project/foundation/src/timer/date.ts b/yarn-project/foundation/src/timer/date.ts
new file mode 100644
index 00000000000..f1ed1ee4361
--- /dev/null
+++ b/yarn-project/foundation/src/timer/date.ts
@@ -0,0 +1,24 @@
+import { createLogger } from '../log/pino-logger.js';
+
+/** Returns current datetime. */
+export class DateProvider {
+  public now(): number {
+    return Date.now();
+  }
+}
+
+/** Returns current datetime and allows to override it. */
+export class TestDateProvider implements DateProvider {
+  private offset = 0;
+
+  constructor(private readonly logger = createLogger('foundation:test-date-provider')) {}
+
+  public now(): number {
+    return Date.now() + this.offset;
+  }
+
+  public setTime(timeMs: number) {
+    this.offset = timeMs - Date.now();
+    this.logger.warn(`Time set to ${timeMs}`);
+  }
+}
diff --git a/yarn-project/foundation/src/timer/index.ts b/yarn-project/foundation/src/timer/index.ts
index 972248c8f41..afb200bb32f 100644
--- a/yarn-project/foundation/src/timer/index.ts
+++ b/yarn-project/foundation/src/timer/index.ts
@@ -1,3 +1,4 @@
 export { TimeoutTask, executeTimeoutWithCustomError } from './timeout.js';
 export { Timer } from './timer.js';
 export { elapsed, elapsedSync } from './elapsed.js';
+export * from './date.js';
diff --git a/yarn-project/validator-client/src/factory.ts b/yarn-project/validator-client/src/factory.ts
index 7ea8b09e8d6..3382163f408 100644
--- a/yarn-project/validator-client/src/factory.ts
+++ b/yarn-project/validator-client/src/factory.ts
@@ -1,5 +1,6 @@
 import { EpochCache, type EpochCacheConfig } from '@aztec/epoch-cache';
 import { type EthAddress } from '@aztec/foundation/eth-address';
+import { type DateProvider } from '@aztec/foundation/timer';
 import { type P2P } from '@aztec/p2p';
 import { type TelemetryClient } from '@aztec/telemetry-client';
 
@@ -11,8 +12,11 @@ import { ValidatorClient } from './validator.js';
 export async function createValidatorClient(
   config: ValidatorClientConfig & EpochCacheConfig,
   rollupAddress: EthAddress,
-  p2pClient: P2P,
-  telemetry: TelemetryClient,
+  deps: {
+    p2pClient: P2P;
+    telemetry: TelemetryClient;
+    dateProvider: DateProvider;
+  },
 ) {
   if (config.disableValidator) {
     return undefined;
@@ -22,7 +26,7 @@ export async function createValidatorClient(
   }
 
   // Create the epoch cache
-  const epochCache = await EpochCache.create(rollupAddress, /*l1TimestampSource,*/ config);
+  const epochCache = await EpochCache.create(rollupAddress, config, deps);
 
-  return ValidatorClient.new(config, epochCache, p2pClient, telemetry);
+  return ValidatorClient.new(config, epochCache, deps.p2pClient, deps.telemetry);
 }
diff --git a/yarn-project/yarn.lock b/yarn-project/yarn.lock
index 9a83f7b8135..b14f188618a 100644
--- a/yarn-project/yarn.lock
+++ b/yarn-project/yarn.lock
@@ -550,7 +550,6 @@ __metadata:
     "@aztec/world-state": "workspace:^"
     "@jest/globals": ^29.5.0
     "@noble/curves": ^1.0.0
-    "@sinonjs/fake-timers": ^13.0.5
     "@swc/core": ^1.4.11
     "@swc/jest": ^0.2.36
     "@types/fs-extra": ^11.0.2
@@ -4536,7 +4535,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@sinonjs/commons@npm:^3.0.0, @sinonjs/commons@npm:^3.0.1":
+"@sinonjs/commons@npm:^3.0.0":
   version: 3.0.1
   resolution: "@sinonjs/commons@npm:3.0.1"
   dependencies:
@@ -4554,15 +4553,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@sinonjs/fake-timers@npm:^13.0.5":
-  version: 13.0.5
-  resolution: "@sinonjs/fake-timers@npm:13.0.5"
-  dependencies:
-    "@sinonjs/commons": ^3.0.1
-  checksum: b1c6ba87fadb7666d3aa126c9e8b4ac32b2d9e84c9e5fd074aa24cab3c8342fd655459de014b08e603be1e6c24c9f9716d76d6d2a36c50f59bb0091be61601dd
-  languageName: node
-  linkType: hard
-
 "@swc/core-darwin-arm64@npm:1.5.5":
   version: 1.5.5
   resolution: "@swc/core-darwin-arm64@npm:1.5.5"