Доступна новая версия расчёта сменного графика: shiftcalendar.online

Shift work schedule maker

Select the first work day (when you start work after your days off)
Set the work schedule (full cycle of work days and days off)
Calendar settings
First day of week
Number of months
Autoscrolling (first month will always be current)
Schedule title (any characters except %, +, ;)