BETTER LATE THAN NEVER

1. John Philip Sousa, late
2. Mamas and Papas classic, late
3. Dragnet cop, late
4. Pilgrims' ship, late
5. Independence Day, late
6. Procrastinator's mantra, late
7. Paul McCartney classic, late
8. Marriage with wide age difference, late
9. Mother Goose schoolboy, late
10. Beginnings of a beard, late
11. News announcement, late
12. When tricks and gags abound, late

Answers:

1. The April King
2. Tuesday, Tuesday
3. Sgt. Joe Saturday
4. Juneflower
5. Fourth of August
6. Day after tomorrow
7. Today
8. June - January
9. An eleven o'clock scholar
10. Six o'clock shadow 
11. Film at twelve
12. May Fool's Day


Credit: LA Times Crossword
Sylvia Bursztyn and Barry Tunick
HEY, DAWDLE DAWDLE  (Idea and #1-3)