1592954349000 1312632483000 term-101992 1616541507939 1312632603000 1616290463414 adlib fitz-online adlib-term-101992 d2c29def-948c-3dc7-9a56-8d9084c0bb80 2 1 scope note Charts or mechanical devices that indicate the day of the week corresponding to any given date over a period of many years. AHD reference term-101988 adlib-term-101988 959784ec-441e-32cb-9d4d-5adb68cb6c7c perpetual calendar V.VW.AFU.AFU.AXC.BCW.AFU 1 code V.VW.AFU.AFU.AXC.BCW.AFU 1 perpetual calendars reference term-101993 adlib-term-101993 048d2f7a-0369-3024-9c54-7ec33d4ed77c calendars perpetual calendars term