"Sat, 15 Feb 2025 21:12:02"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20250215
Only TIME
21:12:02
General datetime
2025-02-15 21:12:02Z
For Database
2025-02-15 21:12:02
For HTTP1.1
Sat, 15 Feb 2025 21:12:02 GMT