"Sat, 21 Dec 2024 05:30:00"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
05:30:00
General datetime
2024-12-21 05:30:00Z
For Database
2024-12-21 05:30:00
For HTTP1.1
Sat, 21 Dec 2024 05:30:00 GMT