Talk:Q14795564
Autodescription — point in time with respect to recurrent timeframe (Q14795564)
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German translation edit
Not sure about this, it's really hard to make it easier. --A.Bernhard (talk) 07:32, 15 October 2013 (UTC)
interval vs point in time edit
@Infovarius: If something occurs every 1st of December, then "1st of December" is the value of the coordinate specifiing a point in time within a given year. The interval (from Latin inter-vallum = between-walls) is one year, i.e. the amount of time between two events.
While we are already talking about this: There are also unbounded intervals so the description of time interval (Q186081) as "temporal extent having a beginning, an end and a duration" is wrong. Furthermore e.g. in German and Dutch it states it is also known as "Zeitperiode" or "periode" respectively which is wrong because period implies something is periodic.
Even worse is event interval (P2257) which sais frequency but actually means period, e.g. the frequency of the example above would be 1/year which is not equal to 1*year and the phase of 1st of December (with 1st of January defined as phase 0) would be something like -2*pi*11/12.
When these statements itself are literally taken all wrong, these errors multiply if you want to deduce something based on relations between two or more items.--Debenben (talk) 17:56, 4 June 2019 (UTC)
- @Debenben: I agree that 1st of December is a coordinate. But it is also a set of intervals, e.g. one of them 1.12.18 00:00:00-1.12.18 23:59:59. --Infovarius (talk) 20:33, 10 June 2019 (UTC)
- @Infovarius: Due to the definition that the timeframe is recurrent, you can say it defines a set of intervals. This is not the same as it is a subclass of an interval. The item also defines a set of editions of some newspaper, but it is not a subclass of a newspaper edition.
- If you take into account the statements in occurrence (Q1190554) then this item point in time with respect to recurrent timeframe (Q14795564) should also not be a subclass of occurrence (Q1190554), because time (corresponding to either coordinate time or proper time in relativity theory) is always one-dimensional and occurence is somewhat loosely defined as spacetime-volume or spacetime-coordinate. The statement of it being an element or a subset of some four-dimensional space is not true for this item point in time with respect to recurrent timeframe (Q14795564). If point in time with respect to recurrent timeframe (Q14795564) would be a proper subclass of occurrence (Q1190554) it would inherit the statements of its parent class.--Debenben (talk) 17:13, 11 June 2019 (UTC)
How to indicate if a day is a moving feast in various calendars? edit
Let's say, on the Wikipedia main page we want to show that today is a moveable feast (Q1825417), feast day (P841) or other day in year for periodic occurrence (P837) in a liturgical year (Q51617), lunar calendar (Q185688) or lunisolar calendar (Q194235). Can we utilize Wikidata and develop a template for this kind of purpose? For example February 25, 2020 (Q57396645) is a Shrove Tuesday (Q4845365) which always happens Easter − 47 days (Q14914941). See also Help:Easter related dates. Where can this be discussed? @Infovarius: @Debenben: Tomastvivlaren (talk) 10:09, 26 February 2020 (UTC)