Random Calendar Builder: Solar Calendars
Year length:
(how many days does it take for the planet to revolve around the sun?)
The year is 7d100 days long.
Now, divide this year length by 4 to find the length of your planet’s seasons.
*If the result is a fraction or decimal: 1/4 or .25 means one season will be one day longer than the others. 1/2 or .5 means two seasons will be one day longer than the others. 3/4 or .75 means three seasons will be one day longer than the fourth. The length of seasons is also the number of days between the solstices and equinoxes.
1d8 Days to Start The Year On:
1. The day after the Winter Solstice, when nights are just beginning to grow longer. The New Year is celebrated as a time of hope, of starting an upward journey after hitting a low point. New Years celebrations might include light-based decorations, songs about light and hope, and making plans for self improvement.
2. A day between the Winter Solstice and the Spring Equinox, which is the anniversary of the dawn of the ruling dynasty who implemented this calendar. (Feel free to select the exact day randomly). The New Year is celebrated as a patriotic event. New Years celebrations might include flying emblems or flags, nationalist and propaganda songs, and speeches or addresses from leaders and politicians.
3. The day of the Spring Equinox, when cold is giving way to warmth, and it is time for planting and for baby animals to be born. The New Year is celebrated as a time of rebirth and new beginnings, and it may be personified as an infant or baby animal. New Years celebrations might include imagery of flowers, eggs, and babies, time spent planting crops or gardens, and songs about joy and rebirth.
4. A day between the Spring Equinox and Summer Solstice, which is the birthday of a deity or other important religious figure. (Feel free to select the exact day randomly) The new year is celebrated as a religious feast day. New Years celebrations might include prayers and songs to the holy figure, feasts in their name, and religious services.
5. The day after the Summer Solstice, when the days are long and hot. The New Year is celebrated as a time of rest, taking a break from hard work and hot sun. New Years celebrations might include observing a day without work, gifts like hats and parasols that protect from the sun, and activities like swimming to cool off or sharing chilled food and drinks.
6. A day between the Summer Solstice and Autumn Equinox, which is the anniversary of the death of a deity or other important religious figure.The New Year is observed as a somber day of religious reflection, where the year that passed may also be treated as a living thing which has died. New Years customs might include fasting or making other sacrifices, lengthy prayers, and wearing veils or other mourning clothes.
7. The day of the Autumn Equinox, when the harvest is in full swing. The New Year is celebrated as a time of bounty and of preparation for the long nights of winter ahead. New Years celebrations might include feasting, songs wishing farewell to the times of plenty and to the sun, and expressing gratitude to the earth, to a deity of fertility, or to farmers for a bountiful harvest.
8. A day between the Autumn Equinox and the Winter Solstice, which is thought to be the anniversary of the creation of the world itself. (Feel free to select the exact day randomly). The New Year is observed as a serious but joyful religious holiday. New Years traditions might include offerings to the god or gods of creation, prayer and song about their power and might, and excursions into the wilderness to behold their creation in its natural state.
Months:
The year is divided into 5d4 months, which may or may not be roughly based on the lunar cycle*. Divide the year length by the number of months to get the length of the months. It’s likely this number won’t be even. If it isn’t, multiply the fraction/decimal by the number of months to get the number of extra days.
1d4 Things to do with Extra Days
1. Make months unequal: distribute the days among certain months, so that some are a day longer than others.
2. Add these days as extra holidays between months: These days aren’t considered part of a particular month, rather falling between the months and being days of rest or celebration. Try to distribute them equally, if you can.
3. Add these days as a multi-day holiday at the end of the year: this extra time becomes an extended period to prepare for the new year, following the tradition rolled on the previous table.
4. Add these days as a multi-day holiday in the middle of the year: this extra time is a mid-year break, situated between two months near the midway point of the year. You can consult the previous table for what this festival might be for, based on what time of year it occurs, or make up something else.
Weeks:
Your calendar’s weeks are informed by how its months are divided. Here are some options for weeks, noting which types of months they work for.
Perfect Weeks: (Does not work for unequal months.) If there is a number between 5-10 that your month length can be evenly divided by, then this can be the length of your week. For calendars with extra days between months, those extra days are also considered to be between weeks.
Unequal Weeks: (Works for any type of months.) Your months are divided into a number of weeks. In order to make that number whole, some of your weeks are a day longer than others.
One Short Week: (Does not work for calendars with extra days added as a multi-day holiday.) Weeks are 1d4+4 days long. If this number does not divide evenly by how long your year is, the remaining days are treated as a multi-day holiday at the end of the year. (Note that this holiday is still considered part of the last month of the year.)
Earth-like Weeks: (Works for any type of months.) Weeks are 1d4+4 days long and do not change or reset at the end of the year or month. What day of the week the year or the month begins on varies from year to year and month to month. If you have holidays that are between months, the weeks should also skip these holidays.
*Bonus: Lunar Cycles in Solar Calendars (Under the Cut)