"Wed, 14 Jan 1970 18:14:45"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700114
Only TIME
18:14:45
General datetime
1970-01-14 18:14:45Z
For Database
1970-01-14 18:14:45
For HTTP1.1
Wed, 14 Jan 1970 18:14:45 GMT