The first mishnah in Rosh Hashanah states that there are 4 times of the year that are called Rosh Hashanah, New Year. Obviously, this refers to different things and each of them ahve there own "year". The mishnah says that the 1stg of Nissan is the Rosh Hashanah for Kings. Which means that when counting the years of a king's reign the ist of Nissan is a new year. The 1st of Elul is the new year for taking the tithes of one's flock.The 1st of Tishrei is the New Year for, counting the years from creation, for Shemmitah, Yovel, etc. The 15th of Sh'vat is the new year for trees, which has ramifications for tithing. There is an interesting ommision from this extensive list and that is the 1st of January. The New Year in the Gregorian calendar. The reason for this ommision is (besides the fact that the mishanah was recored 500 years BCE) quite obviously the fact that "New Years" is not a Jewish holiday. In fact there is nothing Jewish about New Years. In truth there is not much to New Years at all, just an excuse to party and get drunk. The real New Years, Rosh Hashanah, is a day rich with meaning and substance. Our sages tell us that Rosh Hashanah is the day the G-d sits in judgement on all of mankind. It is the day whan all that will transpire in the coming year is determined. It is the day that has the potential to allow us to cleave to Him, to feel His closness. We recognize His total dominion over the whole world. Therein lies the true key to happiness. By fulfilling our full purpose in this world, we are making creation worthwhile.
Get prepared for the upcoming holiday, Purim. Start thinking about shalach manos ,and Purim cards,
Shalom, from Israel