And it happened in the first month in the second year, on the first of the month, that the Tabernacle was set up. The mishkan was set up on the first day of the first month (Nisan). Citing this verse, Ralbag suggests that this spring month of Nisan appears to be the beginning of the year. However, we don’t celebrate the new year in this month, he explains, because to open the year in the harvest season sends the wrong message. First a person must plant and only then can they harvest. To make this point, we start the year in the autumn when it’s time to plant.