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For each week beginning on a given date, the figures show the number of sites that reported they are using the fullcalendar 4.0.0-rc1 release.

FullCalendar project page
fullcalendar 4.0.0-rc1 release page
All FullCalendar usage statistics
Usage statistics for all projects

Week starting	Count
September 27th, 2026	174
September 20th, 2026	163
September 13th, 2026	141
September 6th, 2026	110
August 30th, 2026	117
August 23rd, 2026	69
August 16th, 2026	61
August 9th, 2026	53
August 2nd, 2026	53
July 26th, 2026	42
July 19th, 2026	41
July 12th, 2026	26
July 5th, 2026	14
June 28th, 2026	8

Only Drupal websites using the Update Status module are included in the data. Read more information about how these statistics are calculated.

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Usage statistics for fullcalendar 4.0.0-rc1