The Jewish and Muslim new year celebration coincide this year. What can we learn from this?

Rosh Hashanah and Muharram, the Jewish and Muslim new year celebrations, fall out on the same dates this year (Sept. 21-22, 2017). The two holidays are celebrated very differently. Rosh Hashanah is considered one of the holiest days of the year in Judaism, with days spent in prayer, self-introspection and pledges to do better next [...]