"Sat, 21 Dec 2024 13:11:43"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
13:11:43
General datetime
2024-12-21 13:11:43Z
For Database
2024-12-21 13:11:43
For HTTP1.1
Sat, 21 Dec 2024 13:11:43 GMT