From Wikipedia

Family Reunion Month: A Proclamation in 1985 To raise awareness of a growing trend of runaway children and newly formed organizations to help reunite families of runaways the Congress, by House Joint Resolution 64, has designated the period between Mother's Day, May 12, and Father's Day, June 16, 1985, as "Family Reunion Month" and authorized and requested the President to issue a proclamation in observance of this period.

National Family Reunion Month: While some commercial enterprises have dubbed August as National Family Reunion Month many social groups including churches observe National Family Reunion Month in the month of July.

Family Reunion Planning Month: A family awareness group with a focus on genealogy and traditional family reunion planning established in 2005 named November as "Family Reunion Planning Month". Askew, Mark A. Founder, Legendary Heritage Heirlooms, "Family Reunion Planning Month." (November 2007. In recognition of National Picnic and Recreation Month, GenealogyForum.org named July 2004, Family Reunion Planning Month.

Family Reunion Planning Week: A family values awareness group with a focus on genealogy and traditional family reunion planning established in 2005 suggests November 21-24 as "Family Reunion Planning Week". Askew, Mark A. Founder, Legendary Heritage Heirlooms, "Family Reunion Planning Month." (November 2007)