PSA: outside of Israel, the maariv of Sunday night is the year’s first "tal umatar livrakha" / "barekh aleinu"

For more information: Chabad.org: Why Is the Prayer for Rain Based on the Civil Calendar?

Bonus yekke joke. A yekke comes home from shul one evening. His wife jumps up and says, “Gottfried! You are so late! I thought you died in a traffic accident!” The yekke says, “Ach, Hilde, you’re so silly! You forgot that today is December 4th! We were saying ‘tal umatar livrakha’.”