"Sat, 21 Dec 2024 05:00:15"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
05:00:15
General datetime
2024-12-21 05:00:15Z
For Database
2024-12-21 05:00:15
For HTTP1.1
Sat, 21 Dec 2024 05:00:15 GMT