"Sat, 24 Jan 1970 21:48:09"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700124
Only TIME
21:48:09
General datetime
1970-01-24 21:48:09Z
For Database
1970-01-24 21:48:09
For HTTP1.1
Sat, 24 Jan 1970 21:48:09 GMT