Template:Date-calc: Difference between revisions
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{{#if: {{{date|}}} | |
{{#if: {{{date|}}} | |
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{{#ifeq: {{{operation|}}} | add | |
{{#ifeq: {{{operation|}}} | add | |
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{{# |
{{#switch: {{#time: j | {{{date}}} + {{{days|1}}} days }} |
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| 1 = {{#time: jS F Y | {{{date}}} + {{{days|1}}} days }} |
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| 21 = {{#time: jS F Y | {{{date}}} + {{{days|1}}} days }} |
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| 31 = {{#time: jS F Y | {{{date}}} + {{{days|1}}} days }} |
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| 2 = {{#time: jnd F Y | {{{date}}} + {{{days|1}}} days }} |
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| 22 = {{#time: jnd F Y | {{{date}}} + {{{days|1}}} days }} |
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| 3 = {{#time: jrd F Y | {{{date}}} + {{{days|1}}} days }} |
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| 23 = {{#time: jrd F Y | {{{date}}} + {{{days|1}}} days }} |
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| #default = {{#time: jth F Y | {{{date}}} + {{{days|1}}} days }} |
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}} |
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}} |
}} |
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{{#ifeq: {{{operation|}}} | subtract | |
{{#ifeq: {{{operation|}}} | subtract | |
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{{# |
{{#switch: {{#time: j | {{{date}}} - {{{days|1}}} days }} |
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| 1 = {{#time: jS F Y | {{{date}}} - {{{days|1}}} days }} |
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| 21 = {{#time: jS F Y | {{{date}}} - {{{days|1}}} days }} |
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| 31 = {{#time: jS F Y | {{{date}}} - {{{days|1}}} days }} |
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| 2 = {{#time: jnd F Y | {{{date}}} - {{{days|1}}} days }} |
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| 22 = {{#time: jnd F Y | {{{date}}} - {{{days|1}}} days }} |
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| 3 = {{#time: jrd F Y | {{{date}}} - {{{days|1}}} days }} |
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| 23 = {{#time: jrd F Y | {{{date}}} - {{{days|1}}} days }} |
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| #default = {{#time: jth F Y | {{{date}}} - {{{days|1}}} days }} |
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Revision as of 17:18, 17 December 2024
The template description below will not be displayed when the template is placed.
Template: ─ Template/doc:
Usage
The `Date-calc` template performs date arithmetic (addition or subtraction) using days, weeks, and months. It is useful for calculating dates relative to a given date.
Parameters
- date – The starting date in any valid format recognizable by the `#time` parser function (e.g., `1 April 2024`, `19 December 2024`).
Required
- operation – Specifies whether to add or subtract time. Valid values are:
* add * subtract
- days – The number of days to add or subtract. Defaults to 0 if not provided.
- weeks – The number of weeks to add or subtract. Defaults to 0 if not provided.
- months – The number of months to add or subtract. Defaults to 0 if not provided.
Output
The template outputs the resulting date in the format DD Month YYYY (e.g., 15 January 2024).
Examples
Adding Time
- To add 2 months and 10 days to 1 January 2024:
{{Date-calc|date=1 January 2024|operation=add|months=2|days=10}}
Output: 11 March 2024
- To add 3 weeks to today's date:
{{Date-calc|date={{TODAY}}|operation=add|weeks=3}}
Output: (depends on today's date)
Subtracting Time
- To subtract 1 month and 2 weeks from 17 December 2024:
{{Date-calc|date=17 December 2024|operation=subtract|months=1|weeks=2}}
Output: 3 November 2024
- To subtract 15 days from 15 March 2024:
{{Date-calc|date=15 March 2024|operation=subtract|days=15}}
Output: 29 February 2024
Error Handling
If required parameters are missing:
{{Date-calc|date=|operation=add}}
Output: Please specify a valid date and operation (add or subtract).
Notes
- The template uses the `#time` parser function, which supports various date formats.
- The `days`, `weeks`, and `months` parameters can be used together or separately.
- If all time parameters (days, weeks, and months) are omitted, no calculation is performed, and the input date is returned as-is.