"Sat, 21 Dec 2024 13:34:51"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
13:34:51
General datetime
2024-12-21 13:34:51Z
For Database
2024-12-21 13:34:51
For HTTP1.1
Sat, 21 Dec 2024 13:34:51 GMT