The Mayan calendar ends on the 21st of this year. There were no more after that. Apparently the world ends [yawn]. We'll see the Second Coming first [well, perhaps not]. However, the Druid calendar would mark the date, of the 21st [or whatever it was before the Gregorian calendar] when they would assemble at Stonehenge and other places of Sun God worship to usher in the following year. So far they haven't been wrong. They've even got it right when occasionally, it was December the 22nd that was the shortest day. I'll go with their knowledge. They've been around long enough to know what the time is.
Looking forward to the day after the 21st.