In January, six days: the 1st, 2d, 15th, 26th, 27th and 28th.
In February, four days: the 11th, 21st, 25th and 26th.
In March, two days: the 10th and 24th.
In April, five days: the 6th, 15th, 16th, 20th and 28th.
In May, three days: the 3d, 18th and 31st.
In June, five days: the 10th, 11th, 15th, 22d and 25th.
In July, three days: the 9th, 15th and 28th.
In August, six days: the 6th, 7th, 10th, 11th, 19th and 25th.
In September, five days: the 4th, 8th, 17th, 18th and 23d.
In October, five days: the 3d, 7th, 16th, 21st and 22d.
In November, three days: the 5th, 14th and 20th.
In December, six days: the 15th, 19th, 20th, 22d, 23d and 25th.