A Parallel Timekeeping System of the Glantrian Flaemish Houses #
As Used by the Flaemish Peoples of Glantri #
Compiled by Chris Cherrington (SpicierDM) | myspicerack.com For use with Skills-Based BECMI and the Mystara Campaign Setting Community contribution intended for the Vaults of Pandius With thanks to julius_cleaver (The Piazza) for corrections and suggestions
Historical Context #
The Flaems made Landfall in what would become Glantri in 395 AC — arriving 1,395 years after the main Alphatian Landfall at Sundsvall. They did not arrive from Old Alphatia. They arrived from Earth, carrying with them a cultural and linguistic heritage rooted in Medieval Flemish — a West Germanic tongue related to Dutch and Low German.
Their calendar came with them from that homeland.
The Flaemish calendar predates their contact with the Thothian-influenced Imperial Alphatian calendar, not because they arrived before the Alphatians, but because they arrived independently and from a different source entirely. The month names they brought are Flemish in origin, not Alphatian — but the Flaems, recognizing the structural similarity between their own timekeeping and the Alphatian -mir suffix system, adopted that grammatical framework to make their calendar compatible with the existing arcane community they found themselves among.
The result is a calendar that sounds Alphatian but thinks Flemish.
Why the Flaemish calendar never became official:
The Flaems lost. Every war, every political struggle, every demographic battle. They pushed Thyatian settlers south of the Vesubia, then were defeated by the Alphatians, then fought plague and lost the Forty Year War. By 898 AC they were a minority in their own country — outnumbered by Alphatians, Thyatians, and every other principality house that had arrived after them.
You do not get to impose your calendar when you have lost the Forty Year War.
The Thyatian calendar became the administrative and legal standard of the Principalities. The Flaemish calendar survived the only way a defeated culture’s traditions ever survive — privately, in noble house records, in ceremonial contexts, in the quiet defiance of old families who remember what they were before the outsiders came.
A scholar who encounters a Flaemish noble document dated “14 Oogstmir, Year 607 FY” is seeing two things simultaneously: a date, and a political statement.
The Three Calendars of Glantri #
Glantri operates under three parallel dating systems, each carrying different cultural and political weight:
1. The Thyatian Calendar (Official) The administrative and legal standard. All official documents, contracts, court records, and public communications use Thyatian month names and AC year numbering. No house disputes this in public.
2. The Flaemish Calendar (Traditional) Used privately by the old Flaemish noble houses — Sylaire, Crownguard, Linden, and those who claim descent from the original Landfall families. Flaemish month names and day names appear in private correspondence, family records, and ceremonial contexts. Using Flaemish dating in a private document is a signal of cultural identity. Using it in a public document is a provocation.
3. The Flaemish Year (Historical) A secondary year count used by Flaemish traditionalists, with Year 0 set at the Flaemish Landfall of 395 AC. A document dated “607 FY” corresponds to 1002 AC — the two systems running in parallel, the FY count invisible to anyone who does not know to look for it.
Campaign Hook: A document discovered in a Glantrian noble’s archive carries two dates — one in AC, one in FY. The FY date, when decoded, reveals that an event the party believed happened recently actually occurred 400 years ago — and that someone has been covering up the connection. The FY dating system is the key that unlocks the truth. Characters who have done their historical homework will recognize it. Characters who haven’t will miss the clue entirely.
The Flaemish Year #
The Flaemish year consists of 12 months of 28 days — identical in structure to the Thyatian calendar — plus 4 sacred intercalary days that fall between specific months and do not belong to any month. This gives the Flaemish year 340 days versus the Thyatian 336.
These four intercalary days are called the Heiligdagen — the Holy Days. They are original Flaemish design, not canonical Mystara — created to account for the four extra days the Flaems needed to reconcile their Earth-derived calendar with Mystara’s seasonal rhythms after Landfall. They are not workdays, not counted in month reckonings, and not subject to normal legal or contractual obligations.
Design note: The Heiligdagen and their arcane associations are SpicierDM original content, inspired by the Aristotelian concept of Quintessence (the fifth element, aether) and the Alphatian arcane tradition. They are presented as campaign-usable material, not canonical Mystara.
Months of the Flaemish Year #
Each month has 28 days divided into 4 weeks of 7 days. Moon phases follow the same pattern as the Thyatian calendar: New Moon on Day 1, First Quarter on Day 8, Full Moon on Day 15, Last Quarter on Day 22.
Nieuwmir — Month of New Beginnings #
Thyatian Equivalent: Nuwmont | Season: Early Spring
From Flemish “nieuw” — new
The first month of the Flaemish year. The name reflects both the new calendar year and the first stirrings of spring. Flaemish arcane tradition held that magical currents renewed themselves at this time, making Nieuwmir the preferred month for beginning new studies or launching new experiments.
Intercalary Day following Nieuwmir: MAGIDAG The Day of Magic. The most sacred day of the Flaemish wizard-calendar — a day when the boundary between arcane intention and arcane result was said to be thinner than at any other time of year. Spells cast on Magidag were believed to carry twice their normal potency, for good or ill. Modern Flaemish families mark this day with small household magical demonstrations and the lighting of colored candles.
Regenmir — Month of Rains #
Thyatian Equivalent: Vatermont | Season: Mid Spring
From Flemish “regen” — rain
The spring rains arrive in force during Regenmir. Flaemish tradition holds that magical items cleansed with rainwater collected during Regenmir retain their enchantments longer.
Dooimir — Month of the Thaw #
Thyatian Equivalent: Thaumont | Season: Late Spring
From Flemish “dooi” — thaw
The last frosts break during Dooimir. In Glantri’s high mountain valleys, the canal ice finally gives way. Flaemish tradition marks the first day of open water with small ceremonies of thanksgiving.
Bloesmir — Month of Blossoms #
Thyatian Equivalent: Flaurmont | Season: Early Summer
From Flemish “bloesem” — blossom
The flowering month. Flaemish alchemical traditions hold that certain rare spell components can only be harvested at full potency during Bloesmir — guild records from Glantri’s early history note premium prices paid for herbs gathered specifically during this month.
Intercalary Day following Bloesmir: AETHERDAG The Aetheric Conjunction. Flaemish astronomers marked this day as a moment when the magical currents of the Aether — the fifth element of Aristotelian arcane theory, the Quintessence — aligned with the material world. It falls at the transition from spring to summer. In modern Glantri it is observed as a minor festival of music and outdoor celebration.
Aardmir — Month of Earth #
Thyatian Equivalent: Yarthmont | Season: Mid Summer
From Flemish “aarde” — earth
The fifth month, associated with the element of Earth and with grounding and stability. Flaemish noble families in Glantri traditionally hold contract signings and property transfers during Aardmir — magical constructions begun during this month are believed to prove more durable than those built at other times.
Zomermir — Month of Summer #
Thyatian Equivalent: Klarmont | Season: Late Summer
From Flemish “zomer” — summer
The height of summer. Clear skies and long days define Zomermir. Flaemish air-magic tradition considered this the month of maximum elemental air potency — ideal conditions for flight magic and weather working.
Oogstmir — Month of Harvest #
Thyatian Equivalent: Felmont | Season: Early Autumn
From Flemish “oogst” — harvest
The harvest month. Flaemish tradition marks Oogstmir as the time of greatest earthly abundance — and of magical harvesting as well, with arcane academies traditionally presenting the results of a year’s research at month’s end.
Intercalary Day following Oogstmir: KRACHTDAG The Day of Power. The autumnal equinox marker. The balance between light and dark, between elemental fire and elemental water, creates a moment of perfect magical equilibrium. Spells of binding, sealing, and permanence are especially potent when cast on Krachtdag. Modern Flaemish families observe it with competitive games and feasting.
Vuurmir — Month of Fire #
Thyatian Equivalent: Fyrmont | Season: Mid Autumn**
From Flemish “vuur” — fire
Despite falling in mid-autumn, Vuurmir takes its name from the elemental association with Fire — specifically the fires of the hearth as the world begins to cool. Flaemish tradition holds that fires lit on the first day of Vuurmir should burn continuously through the month.
Najaarmir — Month of the After-Year #
Thyatian Equivalent: Ambyrmont | Season: Late Autumn
From Flemish “najaar” — the after-year, autumn
The amber month of falling leaves. Previously called Herfstmir in early documents — the name was revised at the suggestion of julius_cleaver (The Piazza) whose ear for Flemish phonology proved sharper than the compiler’s. Flaemish families traditionally spend Najaarmir cataloguing, organizing, and preserving — both physical stores for winter and family records and histories.
Stormmir — Month of Storms #
Thyatian Equivalent: Sviftmont | Season: Early Winter
From Flemish “storm” — storm
The winter storms arrive. In Glantri’s mountain valleys, Stormmir brings the first serious snowfall. Flaemish air-magic tradition simultaneously feared and celebrated this month — the elemental air forces at their most violent and therefore most powerful for those skilled enough to work with them.
Intercalary Day following Stormmir: DUISTERDAG The Day of Darkness. The winter solstice marker — the longest night of the year. Flaemish tradition held that on Duisterdag the barriers between the material world and the outer planes were at their thinnest. It was a day of protective ritual, of staying indoors, of burning lights against the dark. In modern Glantri this survives as an evening of storytelling by firelight — the protective purpose largely forgotten, though the unease around the holiday remains.
Nachtmir — Month of Night #
Thyatian Equivalent: Eirmont | Season: Mid Winter
From Flemish “nacht” — night
The month of the longest nights. Flaemish divination traditions associated Nachtmir with the greatest clarity of prophetic vision. Flaemish noble families traditionally consult astrologers and seers during Nachtmir for guidance on the coming year.
Ijsmir — Month of Ice #
Thyatian Equivalent: Kaldmont | Season: Late Winter
From Flemish “ijs” — ice
The final month of the Flaemish year. The coldest, most bitter point of winter. Flaemish tradition held that Ijsmir was a month of endurance and testing. Flaemish families mark the end of Ijsmir with a feast on its final night, welcoming the arrival of Nieuwmir and the new year at midnight.
Days of the Flaemish Week #
| Flaemish | Thyatian | Root | Association |
|---|---|---|---|
| Maanhur | Lunadain | Maan — Moon | The moon and its tides; divination |
| Aardehur | Gromdain | Aarde — Earth | Labor, construction, earthly matters |
| Vurhur | Tserdain | Vuur — Fire | Passion, conflict, magical forge-work |
| Waerhur | Moldain | Waer — Water | Travel, trade, cleansing |
| Nachthur | Nytdain | Nacht — Night | Study, secrets, arcane research |
| Windhur | Loshdain | Wind — Wind | Air magic, speed, communication |
| Zonhur | Soladain | Zon — Sun | Celebration, rest, divine matters |
The Four Heiligdagen — Holy Days #
Original SpicierDM content — not canonical Mystara.
| Heiligdag | Position | Meaning | Modern Observance |
|---|---|---|---|
| Magidag | After Nieuwmir | Day of magical renewal | Colored candles, household magic |
| Aetherdag | After Bloesmir | Aetheric conjunction | Music, outdoor festivals |
| Krachtdag | After Oogstmir | Day of balance and binding | Games, feasting |
| Duisterdag | After Stormmir | Day of the longest night | Storytelling by firelight |
Correspondence with the Thyatian Calendar #
| Flaemish Month | Thyatian Month | Season |
|---|---|---|
| Nieuwmir | Nuwmont | Early Spring |
| — Magidag — | — | — |
| Regenmir | Vatermont | Mid Spring |
| Dooimir | Thaumont | Late Spring |
| Bloesmir | Flaurmont | Early Summer |
| — Aetherdag — | — | — |
| Aardmir | Yarthmont | Mid Summer |
| Zomermir | Klarmont | Late Summer |
| Oogstmir | Felmont | Early Autumn |
| — Krachtdag — | — | — |
| Vuurmir | Fyrmont | Mid Autumn |
| Najaarmir | Ambyrmont | Late Autumn |
| Stormmir | Sviftmont | Early Winter |
| — Duisterdag — | — | — |
| Nachtmir | Eirmont | Mid Winter |
| Ijsmir | Kaldmont | Late Winter |
Flaemish Year Conversion #
Flaemish Year 0 = 395 AC (Flaemish Landfall)
To convert: FY + 395 = AC | AC – 395 = FY
| FY | AC | Notable Event |
|---|---|---|
| 0 | 395 | Flaemish Landfall |
| 5 | 400 | Founding of Braejr |
| 503 | 898 | End of the Forty Year War |
| 607 | 1002 | Standard campaign year |
Notes for the Dungeon Master #
The Flaemish calendar is not in common use in Glantri today. However:
Old Documents — Flaemish noble family archives may use FY dating or Flaemish month names. Translating between systems is a skill, and a party that cannot do so may miss critical information.
The Hidden Date — A document carrying both an AC date and an FY date is sending two messages. The FY date may reveal a connection the author wanted hidden from casual readers.
Ceremonial Contexts — Traditional Flaemish families mark the Heiligdagen privately. A party invited to a Flaemish noble’s estate during Duisterdag will find an unusual atmosphere their hosts may not fully explain.
Linguistic Evidence — A wizard’s private journal dated in Flaemish is a political statement as much as a timekeeping choice. In Glantri’s complex landscape, it signals where someone’s true loyalties lie.
The Heiligdagen and Magic — At DM discretion, the arcane associations of the Heiligdagen may carry real weight. Magidag as a day of enhanced potency. Duisterdag as a day of thinned planar barriers. These reward players who have done their historical homework.
The Flaemish Calendar — A Skills-Based BECMI Community Resource Design: Chris Cherrington (SpicierDM) | myspicerack.com For archiving at the Vaults of Pandius | pandius.com Version 2.0 — June 2026 With thanks to julius_cleaver (The Piazza) for corrections and the Najaarmir suggestion
