The 4-Week Override mini-calendar modifier specifies, for a given mini-calendar, that it only contains 4 rows of @ dates markers (ie. 28 @ markers).
The 4-week override modifier is
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The 4-week override modifier has no equivalent in the user interface of the mini-calendar options.
The main use of the 4-week override modifier is to correctly display 4 week vertical mini-calendar dates, when you may be using a 4-week mini-calendar, a 5-week mini-calendar and a 6-week mini-calendar together with different tab positions to have the first and last weeks of all mini-calendars justified or aligned, as in the example below.

See also: 5-week override and 6-week override.
Topic 181485, last updated on 23-Jun-2020