"Sat, 21 Dec 2024 10:40:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
10:40:20
General datetime
2024-12-21 10:40:20Z
For Database
2024-12-21 10:40:20
For HTTP1.1
Sat, 21 Dec 2024 10:40:20 GMT