Neologisms

Many calendar reform proposals share some concepts, but may use different or ambiguous terms. This page tries to list some neologisms. These may be disambiguating attributes or new words coined from other languages, acronyms and abbreviations, contractions and portmanteaus, astronomic or astrologic features etc.pp. They should not be based upon names of beings, people, places etc.

Month types

Term for a single type of month of 28 days, i.e. 4 weeks exactly, most often used in 13-month leap week calendars:

• moon
• ted, Ted, TED – Twenty-Eight Days
• week-month, wonth, wenth
• double-fortnight
• period

Terms for months of either 4 or 5 weeks, i.e. 28 or 35 days each, as used in Sym454

Common	Shorter one	Longer one
week-month	short week-month	long week-month
wonth	short wonth	long wonth
wenth	short wenth	long wenth
	short month	long month

Terms for months of either 30 or 31 days each (i.e. no 28/29-day February), as used in Sym010

Common	Shorter one	Longer one
month	short month	long month
regular month
symmetry month	onset/coda months margin month, manth outer month , o-month	middle month, minth medial month, medith nucleus month, nuth inner month, i-month
alternating month	odd month	even month
alternating month	even month	odd month

Terms for (lunar) months of either 29 or 30 days each:

Common	Shorter one	Longer one
lunation
luna
moon	short moon	long moon
moonth	short moonth	long moonth
lunar month	hollow month	full month
period	odd period	even period

Common term for mean or fiscal months of exactly either 28, 30 or 30.5 days each, which – unlike the above – may start and end at any date:

• mean month, menth
• fiscal month, finth

Specific term for 4 weeks:

• double-fortnight

Specific term for 30 days:

• thirday

Specific term for 30½ days:

• hosod, Hosod, HoSOD, HOSOD (Half Of Sixty-One Days)

Month names

•  Alternate month names for use with Symmetry Calendars

Week types

5-day week

• pentad(e)

6-day week

• hexad(e)

8-day week

• octav(e)

9-day week

• nonad(e)

10-day week

• decad(e)

Day types

Day of the week

• dow
• weekday

​Work day (e.g. Mon–Sat)

• weekday

Non-weekend day (e.g. Mon–Fri)

• weekday

24-hour period

• Nychthemeron