"Sat, 21 Dec 2024 05:44:18"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
05:44:18
General datetime
2024-12-21 05:44:18Z
For Database
2024-12-21 05:44:18
For HTTP1.1
Sat, 21 Dec 2024 05:44:18 GMT