December 15 is the 349th day of the year (350th in leap years) in the Gregorian Calendar. It is preceded by December 14, and succeeded by December 16. Following December 15, there are 16 days in the year.
Blavatsky's Gem of the Day
"Remember that life is wearing off, and a smaller part of it is left daily."
- 1883 – Rev. C. W. Leadbeater joined The Theosophical Society in London, together with Sir William Crookes and his wife.
- 1889 – Nilakanta Sri Ram, fifth international President of the Theosophical Society (Adyar), serving from 1953-1973 (d. April 8, 1973).
- 1892 – Mary Gebhard, active Theosophist in Germany and associate of Helena Petrovna Blavatsky (b. 1832)
- 1949 – Alice Bailey, teacher and write who cofounded the Arcane School and Lucis Trust with husband Foster Bailey (b. June 16, 1880)
Holidays and observances
- None listed for this date.