Among other enhancements, Textpattern 4.7 has greatly simplified dates processing. To give an example, let’s cite Destry’s request on the Forum:

In the old Parisian journals (newspapers) of the Belle Époque it was common to keep track of paper issues by using Nth année — No. N+1

The first part is counting the year from the first year the paper was published. A given issue would be 1er année in the first year, 2e année in the second, and similar thereon. […] For example, if a journal launched in 2016, it would now be 2e année

The first article on this site was published the `03 Jul 2012`

, so today (i.e. `02 Nov 2018`

) is the 7th year from the beginning. How can we calculate it?

The math behind it is very simple: divide the difference in seconds between today and `03 Jul 2012`

by the number of seconds in an average year and round up the result to the nearest integer. Here are the concerned values:

- The UNIX timestamp of
`03 Jul 2012`

obtained via`strtotime('2012-07-03')`

PHP function is`1341266400`

. - The UNIX timestamp of this article’s publication date is given by
`<txp:posted format="%s" />`

. - The number of seconds in an average year is
`365.25*24*60*60 = 31557600`

.

It remains to plug this data in `<txp:evaluate />`

`<txp:evaluate query='ceiling((<txp:posted format="%s" /> - 1341266400) div 31557600)' />th year`

to get `7th year`

.

Easy, isn’t it… but not very accurate, because of leap years. The rigorous solution is elementary as well:

`<txp:evaluate query='ceiling((<txp:posted format="%Y%m%d" /> - 20120702) div 10000)' />`

and gives `7`

, as expected.

And if you need to output all articles of, say, the 3rd year, use `month`

and `time`

attributes of `<txp:article_custom />`

:

`<txp:article_custom month="2012-07-03 +2 years" time="+1 year" />`

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