"Sat, 21 Dec 2024 12:35:45"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
12:35:45
General datetime
2024-12-21 12:35:45Z
For Database
2024-12-21 12:35:45
For HTTP1.1
Sat, 21 Dec 2024 12:35:45 GMT