"Sat, 20 Jan 2024 20:15:11"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240120
Only TIME
20:15:11
General datetime
2024-01-20 20:15:11Z
For Database
2024-01-20 20:15:11
For HTTP1.1
Sat, 20 Jan 2024 20:15:11 GMT