"Sat, 21 Dec 2024 21:55:11"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
21:55:11
General datetime
2024-12-21 21:55:11Z
For Database
2024-12-21 21:55:11
For HTTP1.1
Sat, 21 Dec 2024 21:55:11 GMT