Timeago: don't use "and 12 months"

[mjourdan]

Is your feature request related to a problem? Please describe.

Calendar date rounding looks a bit weird today. The same day of the year is rounded in all kind of different ways, like:

• X years and 11 months
• Y years and 12 months
• Z years

Describe the solution you'd like

Consistent rounding results for the whole page would look much nicer. Something like either one of these depending on the number of days:

• Z years
• X years and 11 months

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context

For instance, the RHEL page shows the following:

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[captn3m0]

We use the jekyll-timeago gem to generate relative times. Our configuration is the following:

endoflife.date/_config.yml

Lines 54 to 65 in 90b3518

	# jekyll-timeago plugin configuration, see https://github.com/markets/jekyll-timeago
	jekyll_timeago:
	# Use 2 terms in relative timestamps:
	# [YES] x years, y months
	# [YES] x months, z weeks
	# [NO] x years, y months, z days
	depth: 2
	# Give approx times in relative time
	# within a 10% error margin
	# See https://github.com/markets/jekyll-timeago/pull/24
	# for what this does
	threshold: 0.1

There isn't a configuration option that prevents "X years and 12 months" from happening, or even "1 month and 4 weeks". I've filed markets/jekyll-timeago#39 to track this upstream.

Marking this as blocked upstream for now, and we can look at closing once upstream supports this.