"Sat, 21 Dec 2024 21:54:57"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
21:54:57
General datetime
2024-12-21 21:54:57Z
For Database
2024-12-21 21:54:57
For HTTP1.1
Sat, 21 Dec 2024 21:54:57 GMT