Period start and end always wrong with Carbon 3

[bakerkretzmar]

In Carbon 3 the start and end properties of a CarbonPeriod or CarbonPeriodImmutable are always 2000-01-01 and null.

Sandbox example.

Code to reproduce the issue:

[
    Carbon::parse('Sep 1')->toPeriod('Sep 30')->start,
    Carbon::parse('Sep 1')->toPeriod('Sep 30')->end,
];

Carbon version: 3.1.1

PHP version: 8.2.15

Expected (and what Carbon 2 returns):

[
    '2024-09-01 00:00:00', // Carbon\Carbon instance
    '2024-09-30 00:00:00', // Carbon\Carbon instance
];

Received:

[
    '2000-01-01 00:00:00', // DateTime instance
    null,
];

[kylekatarnls]

It's because now CarbonPeriod extends DatePeriod but readonly cannot be controlled from sub-class.

I recommend you use the getters:

[
    Carbon::parse('Sep 1')->toPeriod('Sep 30')->getStartDate(),
    Carbon::parse('Sep 1')->toPeriod('Sep 30')->getEndDate(),
];

[kylekatarnls]

We can make it correct at creation and then CarbonPeriodImmutable would be compatible including start and end properties, the issue will be that for CarbonPeriod start and end can be changed after creation but the properties would sill contain the old values.

[bakerkretzmar]

Thanks! 🙏🏻