Calendar for year overviews. Gregorian, Julian, Jewish, Islamic calendar systems supported. Computes holidays, sunrise, sunset, moonrise, moonset, moon phase, number of day in year, number of week in year, julian day number, remaining days in year, remaining weeks in year. Personal events like holidays, birthdays, vacations etc. Day events and period events with vavarious repeat types. Import/export, count number of days, inspector, event list.