"Sat, 21 Dec 2024 18:45:44"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
18:45:44
General datetime
2024-12-21 18:45:44Z
For Database
2024-12-21 18:45:44
For HTTP1.1
Sat, 21 Dec 2024 18:45:44 GMT