This page describes the different compound date/time formats that the strtotime, DateTime and date_create parser understands.
Note: The "W" in the "ISO year with ISO week" and "ISO year with ISO week and day" formats is case-sensitive, you can only use the upper case "W". The "T" in the SOAP, XMRPC and WDDX formats is case-sensitive, you can only use the upper case "T". The "Unix Timestamp" format sets the timezone to UTC.
Note:
The "W" in the "ISO year with ISO week" and "ISO year with ISO week and day" formats is case-sensitive, you can only use the upper case "W".
The "T" in the SOAP, XMRPC and WDDX formats is case-sensitive, you can only use the upper case "T".
The "Unix Timestamp" format sets the timezone to UTC.