I am in a +11 time zone.
If it was 7:30PM where I was, then +12 is 8:30pm, +13 is 9PM
This still isn't December 31st.
Except you clearly said it was 19:30 EST, which is UTC-5 (00:30 UTC, very clearly the 31st if all times are kept in UTC on the server, which is very likely)
um... It's December 30th, 7:30PM Eastern Standard time.
Reading the datetime of your post, however, I see it was not actually 19:30 EST (rather, it was 03:30) and question why you said it was.
<- Lives in EST zone (AEST != EST ;>)