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  1. 2021 Holidays - calendar-365.com

  2. Holidays and Observances in the United States in 2021 - timeanddate.com

  3. 2021 Holidays - United States - CalendarDate.com

  4. 2021 Calendar - United States - CalendarDate.com

  5. Calendar for Year 2021 (United States) - timeanddate.com

  6. 2021 Calendar with Federal Holidays

  7. 2021 Calendar with Holidays and Date Picker - US

  8. 2021 Holidays (2021 Holidays and Celebrations) - Calendarr

  9. United States 2021 Calendar with Holidays - General Blue

  10. Federal Holidays in USA in 2021 | Office Holidays