Mortum Caelum

Calendars woven from many skies.

The world of Mortum Caelum keeps time in layered ways: lens that divide the days and nights, months that tell the story of seasons and trade, and solstice rituals that reset the year. Explore each system interactively and see how celestial patterns shape every season.

Lenic Cycle

Calendar Converter

Dawn–Dusk
Dusk–Dawn
About the Lenic cycle

The lenic cycle took shape in Thalen because the land itself divided life into two distinct modes. Night pulls the mists up from the Ioma until the world narrows to a few lantern-lit steps, and day draws them back again, revealing the roads, markets, and river paths that make public life possible. Rather than treat day and night as opposites, Thaleni people learned to see them as one continuous motion of concealment and opening. A len became the natural measure of that rhythm, a full turn of privacy and community, and the twelve-len week formed around the dependable pattern of inward nights and outward days.

Historically this pairing formed because sunlight was never the guiding signal here. Mist decided when one could travel or speak broadly and when one must stay close, and this daily contraction and widening shaped every aspect of Thalen’s social world. Over generations this pattern intertwined with religious and philosophical thought, reinforcing the belief that all things come in linked states: what can be shown and what must be kept, what stands in the clear air and what moves through the fog, the communal face and the guarded self. The len became both a practical unit and a cultural truth.

The broader year follows larger pulses of travel, trade, growth, and rest that crest with spring floods, crest again with summer markets, and then contract into the fog and cold. Luthane, the brief solstitial week, sits outside those cycles as the Days Between, a pause where vows are renewed and accounts are rebalanced. Yet it is the daily breathing of the mist, held in each len, that shapes how the people of Thalen actually live inside that year.

Rhythm

Lens of the Week

12 len carry us through the day and night, public and private life.

Solun

Noctira

Varka

Shadda

Myrrin

Eoryth

Zarun

Duskane

Tharka

Velora

Aminel

Sylara

Months

Cycle Names

Five weeks per month, plus the liminal week of Luthane at solstice.

Frunel

Deep winter; renewal and the return of light.

Thirune

First thaw; awakening and hope.

Eldurn

River surge; breaking ice and fiery renewal.

Falaris

Spring; budding, promise, new growth.

Lysan

River at full rush; sparkling warmth.

Hembric

Trade season; legendary explorer Hembric.

Verrin

Thunder; storm, hunting, festivals.

Calia

Midsummer bounty; abundance and celebration.

Serinil

Early harvest; winnowing, cool winds.

Damaris

Alliance and unity; captain Damaris.

Graven

Mists and migration; quiet remembrance.

Obrinth

Closing year; snow, ancestors, reflection.

Luthane

Days Between; liminal week outside the calendar.

Holidays

Lenic Festivals

Culture and history are written into festival and annual routine.

Return of Light (Viriluin)
1st Solun under Frunel

Ceremonies and feasts celebrating the return of light after the longest night.

Icefall Vigil (Sennoryth)
5th Noctira under Frunel

Northmost villages watch the final ice calving and make offerings for the health of river trade.

Wanderer's Vigil (Norathen)
3rd Noctira under Thirune

Vigil for travelers on thawing trails; northern riverfolk light lanterns for safe return.

Rootwater Day (Tornulin)
4th Myrrin under Thirune

Soil blessing and feasts—descendants of canal laborers honor the imported plants that now thrive.

Forebears’ Promise (Halvesset)
1st Eoryth under Falaris

Sworn homage to founding ancestors; river stone offerings, youth naming ceremonies.

Hembric’s Voyage (Hembrikuin)
1st Tharka of Hembric

Parades and river regattas commemorating Hembric’s canal expedition; contracts renewed.

Grand Portage (Yamarin)
5th Zarun of Hembric

Accounts and port records reviewed, grand market auction, honors for river pilots.

Emberlength (Calythel)
2nd Solun under Verrin

Fire-dance and poetry night for diaspora kin, celebrating resilience and shared stories.

Raincall (Felynthir)
4th Tharka under Verrin

Choral gathering to request “just enough” flood; legend says river gods choose the balance.

Festival of Lanterns (Sylithra)
2nd Sylara under Calia

Lantern festival at midsummer, floating lanterns for unity and guidance.

Grain Crossing (Varkhuma)
3rd Varka under Serinil

Grain barge festival; southern merchants race loaded skiffs to mark harvest peak/trade closing.

Joining Eve (Kaviral)
1st Duskane of Damaris

Clan alliance renewal—oath feasts, gathering of clan leaders, origin legal charters.

Memory Dawn (Jonareth)
3rd Solun of Damaris

Morning songs at graves and riverside shrines; sharing food with departed kin.

Mist's Return (Eoryneth)
4th Eoryth under Graven

Mist lamps lit for ancestor remembrance in mountain homes.

Grand Reckoning (Obrithain)
5th Aminel of Obrinth

Ledgers closed, debts settled, ancestor honoring, and winter stores shared.

Luthane Festival (Helkavrin)
The week during Luthane

Out-of-time rites for unions and commitments; communal feasts, vows, and new partnerships celebrated.