It was Swami Vijnanananda (who became Math president in 1937–38), an astrologer, who decided that Ramakrishna Mission would follow this almanac as it was more scientific.
Swami Vijnanananda, a future Math president from 1937 to 1938 and an astrologer, chose for the Ramakrishna Mission to adhere to this almanac because of its scientific nature.