"Sat, 18 Jan 2025 21:49:37"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20250118
Only TIME
21:49:37
General datetime
2025-01-18 21:49:37Z
For Database
2025-01-18 21:49:37
For HTTP1.1
Sat, 18 Jan 2025 21:49:37 GMT