"Sat, 21 Dec 2024 09:40:13"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
09:40:13
General datetime
2024-12-21 09:40:13Z
For Database
2024-12-21 09:40:13
For HTTP1.1
Sat, 21 Dec 2024 09:40:13 GMT