"Wed, 25 Feb 1970 12:02:49"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700225
Only TIME
12:02:49
General datetime
1970-02-25 12:02:49Z
For Database
1970-02-25 12:02:49
For HTTP1.1
Wed, 25 Feb 1970 12:02:49 GMT