"Sun, 23 Jun 2024 13:40:15"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240623
Only TIME
13:40:15
General datetime
2024-06-23 13:40:15Z
For Database
2024-06-23 13:40:15
For HTTP1.1
Sun, 23 Jun 2024 13:40:15 GMT