"Sat, 07 Feb 1970 18:24:49"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700207
Only TIME
18:24:49
General datetime
1970-02-07 18:24:49Z
For Database
1970-02-07 18:24:49
For HTTP1.1
Sat, 07 Feb 1970 18:24:49 GMT