Calendar models - we show crowncaps don't exist in the catalog

When people think of calendars, they usually think of days of the month 1-31, the classic aluminum caps of Leningrad, Moscow, Pskov, Vologda, and so on. These are indeed the majority, but there are also more complex options with ten-day periods, months, quarters, and years in various combinations. To bring order, I introduced calendar models. A model describes the parts of the cap date, the date boundaries, and how dates are formatted. The simplest model is the day of the month, consisting of the series 1, 2, 3, ... 31. On the milk cap, you can find the month model: I, II, III, IV, ... XII. There are also quarterly calendars, for example: I-90, II-90, III-90, IV-90. At LMK, the following months are listed: January 1, January 2, January 3,... December 12. All these cases are covered by the models.

I filled in the corresponding models for all the varieties with calendars. You can see the results in the screenshots – it looks great. Click the button with the flashlight icon – all the gaps in the model – plugs that are not in the catalog – are displayed. If the calendar completely matches the model, the block title will show "Complete calendar".