Infant sleep duration pattern from January to December: daytime sleep gradually decreases from 7.5-2.35 hours and nighttime sleep gradually increases from 8.5-9.7 hours. the total sleep duration comparison table for infants from 1-12 months is: January, 16.5 hours ± 3.15 hours; February, 15.2 hours ± 2.68 hours; March, 14.5 hours ± 2.64 hours; April 14.15 hours ± 2.31 hours; May, 13.33 hours ± 2.14 hours; June, 13.15 hours ± 2.05 hours; July, 13.05 hours ± 1.98 hours; August, 12.84 hours ± 1.99 hours; September, 12.71 hours ± 1.8 hours; October, 12.73 hours ± 1.62 hours; November 12.74 hours ± 1.64 hours; and December, 12.04 hours ± 1.5 hours.