ðɪ ˌɔːɹɡɐnᵻzˈeɪʃən sˈɛləbɹˌeɪɾᵻd baɪ ðə jˌuːnɪtˈɛɹiən jˈʌŋ pˈiːpəlz sˈʌndeɪ hˈɛld ˈænjuːəl mˈiːɾɪŋz bɪɡˈɪnɪŋ ɪn nˈaɪntiːnhˈʌndɹɪd ˈeɪtiːn θɹuː nˈaɪntiːnhˈʌndɹɪd fˈɪfti.
The organization celebrated by the Unitarian Young People's Sunday held annual meetings beginning in 1918 through 1950.