"Sat, 04 Jan 2025 21:18:36"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20250104
Only TIME
21:18:36
General datetime
2025-01-04 21:18:36Z
For Database
2025-01-04 21:18:36
For HTTP1.1
Sat, 04 Jan 2025 21:18:36 GMT