open-props/css/durations.css

:where(:root) {
	--minute: 60s;
	--hour: calc(60 * var(--minute));
	--day: calc(24 * var(--hour));
	--week: calc(7 * var(--day));
	--fortnight: calc(14 * var(--day));
	--month: calc(30 * var(--day));
	--quarter: calc(13 * var(--week));
	--year: calc(365 * var(--day));
	--leap-year: calc(4 * var(--year));
	--decade: calc(10 * var(--year));
	--generation: calc(3 * var(--decade));
	--lifetime: calc(8 * var(--decade));

	--work-day: calc(8 * var(--hour));
	--work-week: calc(5 * var(--day));

	--blink: 0.1s;
	--sneeze: 0.5s;
	--brief-moment: 15s;
	--pause: 10s;
	--unhealthy-pause: 30s;

	/* https://en.wikipedia.org/wiki/List_of_unusual_units_of_measurement */
	--moment: 90s;
	--kermit: calc(14.4 * var(--minute));
	--microfortnight: 1.2096s;

	/* Approximate astronomical durations */
	--sidereal-day: calc((23 * var(--hour)) + (56 * var(--minute)) + 4.091s);
	--iss-orbit: calc(91.5 * var(--minute));
	--lunar-month: calc(29.5 * var(--day));
	--venus-year: calc(225 * var(--day));
	--sol: 88775s;
	--mars-year: calc(668.5907 * var(--sol));

	/*
     * 10 Little-Known Units of Time
     * https://www.mentalfloss.com/article/60080/10-little-known-units-time
     */
	--atom: 0.15957s;
	--ghurry: calc(24 * var(--minute));
	--lustre: calc(5 * var(--year));
	--mileway: calc(20 * var(--minute));
	--nundine: calc(9 * var(--day));
	--nychthemeron: var(--day);
	--punct: calc(15 * var(--minute));
	--quadrant: calc(6 * var(--hour));
	--quinzieme: calc(15 * var(--day));
	--scruple: calc(24 * var(--minute));

	/*
     * The Potrzebie System of Weights and Measures
     * https://madcoversite.com/mad033-36.html
     * https://webmadness.net/resources/The-Potrzebie-system-of-weights-and-measures.pdf
     *
     * There is an inconsistency in the definitions where 1 wolverton = 0.00001 clarke.
     * Calculating fractions of clarkes suggests that a 1 wolverton = 0.00000001 clarke. 
     */
	--clarke: var(--sidereal-day);
	--wood: calc(0.1 * var(--clarke));
	--martin: calc(0.01 * var(--wood));
	--kovac: calc(0.01 * var(--martin));
	--wolverton: calc(0.001 * var(--kovac));
	--mingo: calc(10 * var(--clarke));
	--cowznofski: calc(10 * var(--mingo));

	/*
     * https://en.wikipedia.org/wiki/List_of_humorous_units_of_measurement
     */
	--friedman: calc(6 * var(--month));
	--jiffy: 0.01s;
	--microcentury: calc((52 * var(--minute)) + 35.7s);
	--nanocentury: 3.156s;
	--scaramucci: calc(11 * var(--day));
}