"Tue, 21 Jan 2025 21:18:19"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20250121
Only TIME
21:18:19
General datetime
2025-01-21 21:18:19Z
For Database
2025-01-21 21:18:19
For HTTP1.1
Tue, 21 Jan 2025 21:18:19 GMT