"Sat, 21 Dec 2024 12:21:23"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
12:21:23
General datetime
2024-12-21 12:21:23Z
For Database
2024-12-21 12:21:23
For HTTP1.1
Sat, 21 Dec 2024 12:21:23 GMT