National Sister's Day

Happens each year on the 1st Sunday in August. In 2021, this is August 1st.

Frequency:
1st Sun
in Aug
Hashtags:
References:
holidayinsights.com/moreholidays/August/sistersday.htm
dates.abouttravelingtheworld.com/special-holidays/sisters-day/
punchbowl.com/holidays/sisters-day

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