Getting the Hebrew Calendar right for Rosh Hashanah and on…

It is very important, when looking at the calendar and Feast days to make sure that we have the right months and times.
I, for one, assumed that the current Jewish Calendar was correct with their months and Feast days, unfortunately I was wrong.
According to the Hebrew Calendar, the way the priests set it, Rosh Hashanah will be with the new moon this October and the time I believe Jesus will return will be Feast of Tabernacles after that.
Make sure we get it right, don’t go with the written calendar or the current Jewish calendar.
Read below and the entire article, link below.

The early lunar calendars were agricultural calendars. They were important for planting and harvesting. The Hebrew calendar was set by the priests of Israel every spring. The beginning month of the year was the month of Abib. The word "Abib", meaning "ripe" was the moon which would see the ripening of the barley harvest. This month of Abib was also the month of Nisan. Nisan was determined by a celestial event. The Nisan moon was the first moon that would become a full moon after the passing of the spring equinox. Nisan thereby marked the first month of the year on the Hebrew calendar for the religious year. The Nisan moon, confirmed by the ripening of the barley harvest determined the month in which Passover would be celebrated.

The lunar calendar set forth years of 12 months and 13 months. Every seven years in every nineteen years the religious authorities would find that after the passage of 12 moons the upcoming moon was going to come to fullness short of the spring equinox. It would therefore fail to qualify for the Nisan moon. In such a situation this moon was reckoned to be a second month of Adar and therefore a 13th month for that year. This extra or embolismal month would "push" the next moon, (which of course was now the moon of Nisan), up across the threshold to be the first full moon after the spring equinox.

http://endtimepilgrim.org/70wks5.htm