Clocks that have to be wound by hand fall into two categories, those that have to be wound every day, and those that have to be wound at longer intervals. Those that have to be wound at longer intervals are usually either 8 day clocks, or 31 day clocks. What it means is that the clock is designed to be wound the same time of the month each month. If you had a 31 day clock, you could wind it on the first of every month and know that it would last to the next month no matter what month it was. 8 day clocks are designed to be wound every 7 days.

{| |- | Month 1 10 Month 2 20 Month 3 30 Month 4 40 Month 5 50 Month 6 60 Month 7 70 Month 8 80 Month 9 90 Month 10 100 Month 11 110 Month 12 120 Month 13 130 Month 14 140 Month 15 150 Month 16 160 Month 17 170 Month 18 180 Month 19 190 Month 20 200 Month 21 210 Month 22 220 Month 23 230 Month 24 240 Month 25 250 Month 26 260 Month 27 270 Month 28 280 Month 29 290 Month 30 300 Month 31 310 Month 32 320 Month 33 330 Month 34 340 Month 35 350 Month 36 360 Total of all months 6660 NB: This excludes interest. |}

The month in which you were born is your birthday month

Very slowly and at short intervals.