Today I am a VERY cranky editor
And they do things like:
Koran; Koranic (or Qur'an; Qur'anic)
the Vedas; Vedic
A foolish consistency may be the hobgoblin of little minds, but this strikes me as a foolish INconsistency! What are these people smoking?
The 12th was good for 13 years, then the 13th was good for 11 years, the 14th for 10 years, but the 15th lasted only 7 years. My brain is too old to anticipate a 17th!