"Sun, 15 Dec 2024 18:59:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241215
Only TIME
18:59:20
General datetime
2024-12-15 18:59:20Z
For Database
2024-12-15 18:59:20
For HTTP1.1
Sun, 15 Dec 2024 18:59:20 GMT