Solstices

This software calculates accurate dates and times for equinoxes, solstices and the Celtic cross-quarter days (Imbolc, Beltane, Lughnassad and Samhain). The cross-quarter days are those midway between the equinoxes and solstices. For example, Imbolc is midway between the northern winter solstice... Platforms: Windows

accumSeasonTS- aggregate timeseries to solstices and equinoxesUsing G. Cardillo function to compute solstices and equinoxes, this function will aggregate time series data (e.g. Precipitation) to seasonally summarized results. To accomplish this three core functions are used: eqnsol, unique, and... Platforms: Matlab

Surprisingly, I never came across the simple solution of aggregating data using accumarray. Accumarray needs indices supplied to aggregate too. Combining this with the Unique function, the user can quickly and conveniently aggregate data using any available and appropriate funciton supported by... Platforms: Matlab

Create and print calendars and keep organized with this intuitive program. Options to load from tray, change fonts and colors, export to bitmap and insert clip art and images. Includes automatic holidays, daylight savings, lunar phases, solstices, and religious dates. Stay organized: Download... Platforms: Windows

A program to convert between dates in various Chinese calendars and dates in the Gregorian and Julian calendars, and to find lunar new year's day and leap months for any year.Supports 60-year and 60-day cycles, includes Chinese names, and allows searching for dates and times of full moons,... Platforms: Windows

Millennia Calendar displays local time for any locations on the Earth; includes many traditional and modern calendars; displays holidays of many countries and religions; displays time of rise/set of the Sun, the Moon and Planets; displays dates of equinoxes and solstices, dates of solar and lunar... Platforms: Windows