Direct answer and planning notes
April 2029 has 21 business days when business days mean Monday through Friday and holidays are not subtracted. The month has 30 calendar days, starts on a Sunday, ends on a Monday, and includes 9 weekend days.
Use this as a clean baseline for invoices, payroll cutoffs, sprint capacity, subscription renewals, classroom pacing, and shipping schedules. If your country, bank, school, employer, or exchange observes holidays during April 2029, subtract those closed days from the 21-day baseline.
Formula: adjusted business days = 21 weekday baseline − observed holidays − company closures + approved make-up workdays.