"Sat, 21 Dec 2024 20:38:30"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
20:38:30
General datetime
2024-12-21 20:38:30Z
For Database
2024-12-21 20:38:30
For HTTP1.1
Sat, 21 Dec 2024 20:38:30 GMT