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  1. May 15th Holidays - National Today

  2. May 15 - Holidays and Observances

  3. May 15 Holidays (2025/2026), Historical Events, Famous Birthdays

  4. National Holidays on May 15th, 2025 - Days Of The Year

  5. May 15 - Wikipedia

  6. May Holidays and Observances 2024: Full Calendar

  7. May 15 - National Day Calendar

  8. May 15th Holidays: Celebrations and Observances Worldwide

  9. MAY 15TH: National Holidays, Observances & Famous Birthdays

  10. May 15, 2023, United States - holidays and celebrations on