"Mon, 19 May 2025 14:45:00"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20250519
Only TIME
14:45:00
General datetime
2025-05-19 14:45:00Z
For Database
2025-05-19 14:45:00
For HTTP1.1
Mon, 19 May 2025 14:45:00 GMT