HARVARD -- The School Committee has approved several mid-year changes to the school calendar.

Originally there was to be early release on Wednesday, April 10. Instead, there will be an early release day on Tuesday, April 9, when the Bromfield School hosts polling machines for the annual town elections.

The committee became aware of another mistake with the original 2012-2013 school year calendar: There were 20 (instead of 17) early release days atop the traditional three Thanksgiving week half days used for parent-teacher conferences.

The committee has now carved three early-release days off the calendar. The following dates are now full school days: Wednesday, Jan. 30, Tuesday, April 30, and Wednesday, May 8.