Twelfth month needs to include day 366 (leap year) for calendar received prior to February 28, 2011.
The following link is the corrected page that can be printed. I was working on all Enoch years from 2011 to 2018 when I discovered that on earlier issues of the Enoch Calendar for 2011-2012 I did not include day 366 at the end of the year.
To view and print requires Adobe Reader (Free download) .
The equinoxes follow a four-year cycle. Each year the time of the equinox differs from the prior year by about 5 hours and 55 minutes, plus or minus a few minutes. When the leap year comes, the time of the equinox is early in the morning. For example, at 5:14 AM UTC. This means that one has to observe the equinox at sunrise and wait until sunset to start the new year. All of the Enoch years in the 21st century start on evening of the 20th of March after sunset. In other years the equinox time is close enough to the evening sunset to make the observation during the last hour before sunset. The Enoch Calendars use Jerusalem time. which is 2 hours later than UTC.
Here are the UTC times of the spring equinox from 2011 to 2018 (March 20)
2012: 0514 (Leap Year)
2016: 0430 (Leap Year)
Notice the small difference between the four-year cycles.