"Mon, 20 Jan 2025 21:49:38"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20250120
Only TIME
21:49:38
General datetime
2025-01-20 21:49:38Z
For Database
2025-01-20 21:49:38
For HTTP1.1
Mon, 20 Jan 2025 21:49:38 GMT