Crossword puzzle clue "post trip occurrence"

Post-trip occurrence

Rare occurrence at the U.S. Open on Father's Day that's a common occurrence at the U.S. Open on Labor Day

Post-retirement occurrence

"____ trip! ____ trip!" (chant before a long car ride)

Contacted without a trip to the post office, say

Trip to the post office, e.g.

Mrs. Stork's post-trip comment?

Post-trip assurance