Father's Day (June 16, Gregorian) was first observed on June 16, 1910, in Spokane, Washington, United States. Sonora Smart Dodd, a resident of Spokane, proposed the idea of a day to honor fathers, inspired by the growing popularity of Mother's Day in the United States. She presented her suggestion to the local church council, and after receiving approval, the first Father's Day ceremony was organized in local churches. During the initial observance, children honored their fathers by giving flowers and participating in religious and family gatherings. The idea gradually spread to other states in the US and was later adopted in various countries, often on different dates. In subsequent years, the US government and some other countries officially added Father's Day to their calendars. Father's Day was designated in the Gregorian calendar in 1910 as a result of Sonora Smart Dodd's efforts and the support of social and religious organizations, to recognize the role and responsibilities of fathers in families and society. The day is typically marked by giving gifts, holding family gatherings, and recognizing the role of fathers in families and society. Its significance lies in strengthening family bonds and acknowledging the responsibilities of fathers.