Summarize the main points of this source.
There are four days in the year which are observed as holidays, and on which the mills are never put in motion. These are Fast Day, Fourth of July, Thanksgiving Day, and Christmas Day. These make one day more than is usually devoted to pastime in any other place in New England. The following information shows the average hours of work per day, throughout the year, in the Lowell Mills:
January: 11 hours, 24 minutes
February: 12 hours
March: 11 hours, 52 minutes
April: 13 hours, 31 minutes
May: 12 hours, 45 minutes
June: 12 hours, 45 minutes
July: 12 hours, 45 minutes
August: 12 hours, 45 minutes
September: 12 hours, 23 minutes
October: 12 hours, 10 minutes
November: 11 hours, 56 minutes
December: 11 hours, 24 minutes