Loveland is known as the nation’s “Sweetheart City!” To celebrate its 75th (Diamond) Valentine’s celebration, Loveland’s post offices and chamber of commerce receive over 120,000 valentines from all 50 states and 110 countries through the largest valentine mailing campaign. Designed by artist Corry McDowell, the 2021 collector’s envelope includes a verse written by Judy Rethmeier, …