diff --git a/docs-2.0/2.quick-start/6.cheatsheet-for-ngql.md b/docs-2.0/2.quick-start/6.cheatsheet-for-ngql.md
index 1193bd809eb..282d6bc93b6 100644
--- a/docs-2.0/2.quick-start/6.cheatsheet-for-ngql.md
+++ b/docs-2.0/2.quick-start/6.cheatsheet-for-ngql.md
@@ -82,8 +82,8 @@
 
   |Function| Description |
   |----  |  ----|
-  |int now()  | Returns the current date and time of the system timezone. |
-  |timestamp timestamp() | Returns the current date and time of the system timezone. |
+  |int now()  | Returns the current timestamp of the system. |
+  |timestamp timestamp() | Returns the current timestamp of the system. |
   |date date() | Returns the current UTC date based on the current system. |
   |time time() | Returns the current UTC time based on the current system. |
   |datetime datetime() | Returns the current UTC date and time based on the current system. |  
diff --git a/docs-2.0/3.ngql-guide/3.data-types/4.date-and-time.md b/docs-2.0/3.ngql-guide/3.data-types/4.date-and-time.md
index e290b6ceb58..2c50b1954b8 100644
--- a/docs-2.0/3.ngql-guide/3.data-types/4.date-and-time.md
+++ b/docs-2.0/3.ngql-guide/3.data-types/4.date-and-time.md
@@ -96,7 +96,7 @@ The `TIMESTAMP` data type is used for values that contain both date and time par
 
 - Supported `TIMESTAMP` inserting methods: timestamp, `timestamp()` function, and `now()` function.
 
-- `timestamp()` function accepts empty arguments to get the timestamp of the current timezone.
+- `timestamp()` function accepts empty arguments to get the current timestamp.
 
 - `timestamp()` function can convert `DATETIME` to `TIMESTAMP`. The data type of `DATETIME` should be a `string`. 
 
diff --git a/docs-2.0/3.ngql-guide/6.functions-and-expressions/3.date-and-time.md b/docs-2.0/3.ngql-guide/6.functions-and-expressions/3.date-and-time.md
index f304db740d4..0681d403bc1 100644
--- a/docs-2.0/3.ngql-guide/6.functions-and-expressions/3.date-and-time.md
+++ b/docs-2.0/3.ngql-guide/6.functions-and-expressions/3.date-and-time.md
@@ -4,8 +4,8 @@ NebulaGraph supports the following built-in date and time functions:
 
 | Function              | Description                                                        |
 |:--                    |:--                                                                 |
-| int now()             | Returns the current date and time of the system time zone.         |
-| timestamp timestamp() | Returns the current date and time of the system time zone.         |
+| int now()             | Returns the current timestamp of the system.                       |
+| timestamp timestamp() | Returns the current timestamp of the system.                       |
 | date date()           | Returns the current UTC date based on the current system.          |
 | time time()           | Returns the current UTC time based on the current system.          |
 | datetime datetime()   | Returns the current UTC date and time based on the current system. |