First Day of Hispanic Heritage Month Calendar Add to Calendar Add to Timely Calendar Add to Google Add to Outlook Add to Apple Calendar Add to other calendar Export to XML When: September 15, 2023 all-day 2023-09-15T00:00:00-07:00 2023-09-16T00:00:00-07:00 Holidays Observance To hide observances, go to Google Calendar Settings > Holidays in United States