Der Almanack MCP-Server,
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“Nutze „validate_calendar_spec“: Check a calendar spec and list everything wrong with it. Returns structured errors and warnings; it never throws and never partially accepts.”

“Nutze „convert_date“: Convert between a calendar date, its day number, and its Gregorian date. Give exactly one of date, day_number, gregorian or one of their plu.”

“Nutze „calendar_weekday“: Which weekday a date falls on, as a 0-based index into the calendar's own week plus its name. Exact; never estimates. Returns weekday null w.”

“Nutze „nth_weekday_of_month“: The nth given weekday of a month: the 3rd Tuesday, the last Friday. n is 1-based from the start of the month, or negative from the end (-1 i.”

validate_calendar_spec — Check a calendar spec and list everything wrong with it. Returns structured errors and warnings; it never throws and never partially accepts

convert_date — Convert between a calendar date, its day number, and its Gregorian date. Give exactly one of date, day_number, gregorian or one of their plu

calendar_weekday — Which weekday a date falls on, as a 0-based index into the calendar's own week plus its name. Exact; never estimates. Returns weekday null w

nth_weekday_of_month — The nth given weekday of a month: the 3rd Tuesday, the last Friday. n is 1-based from the start of the month, or negative from the end (-1 i

date_interval — The distance between two dates. 'days' is the exact signed count (negative when end precedes start) and is always reliable. 'calendar' break

add_to_date — Move a date by years, months, days and ticks. They are applied in that fixed order, which matters: a month then a day is not always the same

moon_phases — Every moon's phase on a date. 'fraction' is the exact position in the cycle, 0.0 at new and 0.5 at full, and is the number to compute with.

format_calendar_date — Write a date out to a pattern. pattern is either a name from the calendar's own 'formats' (names win) or a pattern written out. Tokens: {day