"Sat, 18 Jan 2025 21:11:02"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20250118
Only TIME
21:11:02
General datetime
2025-01-18 21:11:02Z
For Database
2025-01-18 21:11:02
For HTTP1.1
Sat, 18 Jan 2025 21:11:02 GMT