calendar

:calendar (AMR annotation guidance)

The role :calendar is used for the calendars of various cultures:

Gregorian calendar (modern Western, de facto international standard)
Julian calendar (old Western, differs from Gregorian calendar in which years are leap years)
Islamic calendar (lunar calendar; 1 AH = 622 AD, 1434 AH = Nov. 14, 2012 to Nov. 4, 2013)
Hebrew calendar (lunisolar calendar = lunar calendar with leap months; 5773 AM = Sept. 16, 2012 - Sept. 4, 2013)
Japanese calendar (regnal solar calendar)

The role :calendar is also used for years that differ from the standard calendar year. In these cases, the concept year is included:

academic years
fiscal years

Example: The 9.3 Tohoku earthquake occured in the year Heisei 23 .
     (e / earthquake
           :location (c / country-region :wiki "Tōhoku_region"
                 :name (n / name :op1 "Tohoku"))
           :quant (s / seismic-quantity :quant 9.3)
           :time (d / date-entity :year 23 :era "Heisei"
                 :calendar (c2 / country :wiki "Japan"
                       :name (n2 / name :op1 "Japan"))))

Example: "Muharram 1434 AH"
(d / date-entity :year 1434 :month 1
:calendar (i / islam))

Example: "Adar II 5771"
(d / date-entity :year 5771 :month 13
:calendar (h / hebrew))

Example: "The Bolshevik revolution started on October 25, 1917."
     (s / start-01
           :ARG1 (r / revolution-03
                 :ARG0 (p / political-party :wiki "Bolsheviks" :name (n / name :op1 "Bolshevik")))
           :time (d / date-entity :month 10 :day 25 :year 1917
                 :calendar (j / julian)))

Example: "The Bolshevik revolution started on Novmber 7, 1917."
     (s / start-01
           :ARG1 (r / revolution-03
                 :ARG0 (p / political-party :wiki "Bolsheviks" :name (n / name :op1 "Bolshevik")))
           :time (d / date-entity :month 11 :day 7 :year 1917
                 :calendar (g / gregorian)))

Example: academic year 2011-2012
     (d / date-entity :year 2011 :year2 2012
           :calendar (y / year
                 :mod (a / academia)))

Example: United States government fiscal year 2012
     (d / date-entity :year 2012
           :calendar (y / year
                 :mod (f / finance)
                 :mod (g / government-organization
                       :ARG0-of (g2 / govern-01
                             :ARG1 (c / country :wiki "United_States"
                                   :name (n / name :op1 "United" :op2 "States"))))))

See also general examples for date entities.

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