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Holidays for Monday, April 15th, 1991

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Image for ASL Day
Also known as American Sign Language Day

Observed annually on April 15th
Image for Income Tax Pay Day
Also known as Tax Day

Observed annually on April 15th unless it falls on holiday or weekend. If so, it is the following weekday that isn't a holiday.
Image for Patriots' Day
Observed the third Monday in April
Image for On This Day in History
Things that happened on this day in years past

Multi-day Events Continuing on Monday, April 15th, 1991