"Thu, 12 Feb 1970 21:42:59"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700212
Only TIME
21:42:59
General datetime
1970-02-12 21:42:59Z
For Database
1970-02-12 21:42:59
For HTTP1.1
Thu, 12 Feb 1970 21:42:59 GMT