May 9th — v7.0.0-rc.3
Version 7 will be released soon. Read the v7 docs
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dayHeaders

Whether the day headers should appear. For the Month, TimeGrid, and DayGrid views.

Boolean, default: true

The default is to show these column headers, but if you would like to hide them, especially if you have a single-day view and you feel the column header is unnecessary, you can set it to false.