The calendar was created in China. It was first used in the "Rintoku" era during the Tang Dynasty..
ð ə WORD_BOUNDARY k æ l ə n d ə ɹ WORD_BOUNDARY w ʌ z WORD_BOUNDARY k ɹ iː eɪ t ɪ d WORD_BOUNDARY ɪ n WORD_BOUNDARY t̠ʃ aɪ n ə WORD_BOUNDARY ɪ t WORD_BOUNDARY w ʌ z WORD_BOUNDARY f ɜː s t WORD_BOUNDARY j uː z d WORD_BOUNDARY ɪ n ð ə WORD_BOUNDARY ɹ ɪ n t oʊ k uː WORD_BOUNDARY iə ɹ ə WORD_BOUNDARY d ʊ ɹ ɹ ɪ ŋ WORD_BOUNDARY ð ə WORD_BOUNDARY t æ ŋ WORD_BOUNDARY d aɪ n ʌ s t i WORD_BOUNDARY