"Sat, 21 Dec 2024 12:21:38"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
12:21:38
General datetime
2024-12-21 12:21:38Z
For Database
2024-12-21 12:21:38
For HTTP1.1
Sat, 21 Dec 2024 12:21:38 GMT