World's Day of Remembrance for Victims of Katyn Massacre

Happens annually on the 13th of the month of April.

Frequency:
Every
Apr 13
Inception Year:
2008
Hashtags:
n/a
References:
premier.gov.pl/…/celebrations-of-worlds-day-of-remembrance-for-v…
enrs.eu/…/1396-day-of-remembrance-for-victims-of-katyn-massacre-2

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