"Sat, 21 Dec 2024 16:30:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
16:30:21
General datetime
2024-12-21 16:30:21Z
For Database
2024-12-21 16:30:21
For HTTP1.1
Sat, 21 Dec 2024 16:30:21 GMT