this is my endless calender swappie which you can easily assemble. The sequences for the days are 1 on the top of the first stack and following are 3,5,7,9,11,13,15 the second stack have the sequence 29 on the top then 27,25,23,21,19,17. Now you take the first stack and put it into the box that the 1 is visible through th hole and then you gonna take the secong stack and put it into the box that the two is visible through the other hole. Now you can stick the plate on top of the box and the this box is finished. Tof the months it's the same way to assemble and the sequence is JUL on the bottom then MAY is following and then comes MAR and on the top is JAN. The other stack has the sequence SEP on the bottom then NOV and the the backside of JUN. WATCH OUT sometimes cards won't fall in the back so the calender wo'nt work if this matters you can just push the card on the back down and then it should work.

Sorry for my english:)