Question: To what time did the Council require the date of the vernal equinox to be set?
Sentence: The Council of Trent approved a plan in 1563 for correcting the calendrical errors, requiring that the date of the vernal equinox be restored to that which it held at the time of the First Council of Nicaea in 325 and that an alteration to the calendar be designed to prevent future drift.
Answer in sentence: yes