"Sat, 21 Dec 2024 14:55:12"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
14:55:12
General datetime
2024-12-21 14:55:12Z
For Database
2024-12-21 14:55:12
For HTTP1.1
Sat, 21 Dec 2024 14:55:12 GMT