calendrical
adjective
ca·len·dri·cal kə-ˈlen-dri-kəl 
ka-
variants or less commonly calendric
kə-ˈlen-drik
ka-
: of, relating to, characteristic of, or used in a calendar
Example Sentences
Recent Examples on the Web But despite the calendrical bad omen, this will be a lucky day: Apophis will not strike our planet—this time, anyway (its orbit ensures Apophis will visit us again in 2036, 2051, 2066 and so on). 
Scientific American, 13 Oct. 2021 The ritual observation of the passage of FDR’s calendrical contrivance promises to be even more turgid than usual this year. Gerard Baker, WSJ, 26 Apr. 2021 And to account for calendrical drift, when the length of the year doesn't line up with the astronomical calendar (365.24 days, just about), its creators have added an extra week at the end of December every five or six years. Scottie Andrew, CNN, 29 Feb. 2020 How’s this for a calendrical trifecta: Sunday is Super Bowl Sunday. Ben Guarino, BostonGlobe.com, 31 Jan. 2020 Tracing someone’s intellectual interests across a lifetime can be more meaningful than dragging the subject and the reader ever onward through calendrical time. Casey Cep, The New Yorker, 21 Oct. 2019 And yet, once again, when the calendar rolled to August, the news of the new month seemed to come as a complete surprise to local news anchors, many of whom, once again, expressed their dismay over the calendrical wake-up call. Melissa Locker, Time, 2 Aug. 2019 Start counting with Friday, there are 11 days from now through Labor Day, the symbolic (though neither calendrical nor meteorological) end of summer in Milwaukee. Chris Foran, Milwaukee Journal Sentinel, 24 Aug. 2017 There, at the top of New Mexico’s Fajada Butte, Sofaer found what’s known as the Sun Dagger, a calendrical marking created from two spirals etched into the rock. National Geographic, 20 Mar. 2018 See More
Scientific American, 13 Oct. 2021 The ritual observation of the passage of FDR’s calendrical contrivance promises to be even more turgid than usual this year. Gerard Baker, WSJ, 26 Apr. 2021 And to account for calendrical drift, when the length of the year doesn't line up with the astronomical calendar (365.24 days, just about), its creators have added an extra week at the end of December every five or six years. Scottie Andrew, CNN, 29 Feb. 2020 How’s this for a calendrical trifecta: Sunday is Super Bowl Sunday. Ben Guarino, BostonGlobe.com, 31 Jan. 2020 Tracing someone’s intellectual interests across a lifetime can be more meaningful than dragging the subject and the reader ever onward through calendrical time. Casey Cep, The New Yorker, 21 Oct. 2019 And yet, once again, when the calendar rolled to August, the news of the new month seemed to come as a complete surprise to local news anchors, many of whom, once again, expressed their dismay over the calendrical wake-up call. Melissa Locker, Time, 2 Aug. 2019 Start counting with Friday, there are 11 days from now through Labor Day, the symbolic (though neither calendrical nor meteorological) end of summer in Milwaukee. Chris Foran, Milwaukee Journal Sentinel, 24 Aug. 2017 There, at the top of New Mexico’s Fajada Butte, Sofaer found what’s known as the Sun Dagger, a calendrical marking created from two spirals etched into the rock. National Geographic, 20 Mar. 2018 See More Word History
Etymology
calendar entry 1 + -ical or -ic entry 1
First Known Use
1832, in the meaning defined above