The Mouvelian Calendar (aka Prophecies, aka "AE") works best. The Elonian Calendar is just 200 years ahead (or was it behind?), but it's still a bit confusing.
Canthan Calendar is just utter bull crap to me. Don't ever go by it.
It IS confusing though...I know by heart:
1072: Prophecies + Factions
I wasn't sure about GW:EN. According to the trailer, Gwen states "six years ago, my world burned" so I thought six years ago was the searing, as in 1070 so GW:EN is 1076. However, others say GW:EN is in 1078 meaning she references AFTER the searing.