《史记·八书·历书》
月朔大余三十二日，小余二百七十七分；冬至大余五十二日，小余十六分；
大馀三十二，小馀二百七十七；大馀五十二，小馀一十六；
The first day of the month is more than 32 days, less than 277 minutes; the winter solstice is more than 52 days, less than 16 minutes;