Template:Calendar date
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 | This template is rated as alpha. It is ready for third party input, and may be used on a few pages to see if problems arise, but should be watched. Suggestions for new features or changes in their input and output mechanisms are welcome. |
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{{Calendar date}} aka {{Moveable date}} is for displaying the calendar date of holidays or events that move annually, that do not have a fixed day and month of occurrence.
Examples include the Jewish new year Hanukkah which is based on a non-Gregorian calendar system. The June solstice wobbles celestially.
Usage[edit]
The template requires only two arguments, the holiday/event name (|holiday= or |event= are synonymous) and the year |year= in the Gregorian calendar.
Example:
{{calendar date |holiday=Rosh Hashanah |year=2019}}- Produces:
- Sunset, 29 September 2019 – nightfall, 1 October 2019
Optionally try |format=infobox in an infobox
Example:
{{Calendar date |holiday=Rosh Hashanah |year=2019 |format=infobox}}- Produces:
- Sunset, 29 September –
nightfall, 1 October
- Sunset, 29 September –
Options[edit]
Required
- holiday or event
- Name of an available holiday. Ex.
|holiday=Rosh Hashanahor|event=Rosh Hashanah - year
- Year of event. Ex.
|year=2019
Options
- df
- Date Format options can be "dmy", "mdy" or "iso" (
|df=dmy). Defaults are set in Module:Calendar date/events - format
- Use
|format=infoboxin an infobox - cite
- If set to anything (
|cite=) a citation is added.
Adding or editing holidays[edit]
Holidays are configured in Module:Calendar date/events which has additional documentation and examples.
There are two holiday types: "calculator" and "localfile".
calculator - Moveable dates are determined with a calculator plugin. For example Rosh Hashanah uses the {{Hebrew year}} calculator:
datatype = "calculator"datasource = "{{#time:Y-m-d|@{{Hebrew year/rhdatum|{{#timel:xjY|YYYY-11-1}}}}-1 days}}"
- When the template runs, it replaces "YYYY" with the value of the
|year=argument, then executes thedatasourcecode. Calculators can be any available on Wikipedia, so long as it accepts a year value and returns a date in ISO format. All calculators are third-party plugins, the template does not do calculations.
localfile - When a calculator is not possible or unavailable, moveable dates can be stored in local files. For example with Tu BiShvat:
datatype = "localfile"datasource = "Module:Calendar date/localfiles/Tu BiShvat"
- The file Module:Calendar date/localfiles/Tu BiShvat contains a static list of dates.
wikidata - <to be developed - see talk page for more info>
Holidays with multiple aliases[edit]
If a holiday has multiple aliases, and it's desired the template support them with the |holiday= argument, create multiple entries in Module:Calendar date/events one for each name.
Dynamic dates[edit]
The |year= can accept templates.
- For example, to show the current year for Tu BiShvat use {{CURRENTYEAR}}:
{{Moveable date |holiday=Tu BiShvat |year={{CURRENTYEAR}}}}
- Produces
- Sunset, 24 January 2024 – nightfall, 25 January 2024
Other useful templates are {{LASTYEAR}} and {{NEXTYEAR}}.
Combined they can be used in infoboxes to fully automate updates, example from the Hanukkah infobox:
|date{{LASTYEAR}} = {{Moveable date |holiday=Hanukkah |year={{LASTYEAR}} |format=infobox |cite=}}|date{{CURRENTYEAR}} = {{Moveable date |holiday=Hanukkah |year={{CURRENTYEAR}} |format=infobox}}|date{{NEXTYEAR}} = {{Moveable date |holiday=Hanukkah |year={{NEXTYEAR}} |format=infobox}}|date{{NEXTYEAR|2}} = {{Moveable date |holiday=Hanukkah |year={{NEXTYEAR|2}} |format=infobox}}
Offset date[edit]
An offset date can be calculated for a given moveable date using #time parser function.
- For example, to show the date of the Friday following Ascension Thursday:
{{Moveable date |holiday=Ascension Thursday |df=dM |year={{CURRENTYEAR}}}}{{#time: d M Y| {{Moveable date |holiday=Ascension Thursday |df=d |year={{CURRENTYEAR}}}} + 1 day}}- Produces
- 9 May 2024
- 10 May 2024
Tracking categories[edit]
VisualEditor TemplateData[edit]
What is this? See https://www.mediawiki.org/wiki/Help:TemplateData
A template for displaying moving calendar dates
| Parameter | Description | Type | Status | |
|---|---|---|---|---|
| Name of holiday/event | holiday | The name of the holiday or event
| String | required |
| Holiday year | year | The year to display the holiday dates for
| String | required |
| Display format option | format | Options for controlling display output such as for an infobox
| String | optional |
| Date Format | df | Date format to use when displaying dates
| String | optional |
External links[edit]
- Simple holidays by Mark Seemann