General Knowledgespeaking topic
The lunar calendar is about eleven days shorter than the solar one, which is why Ramadan drifts through every season over the years; it is observed in winter and in summer alike. Some peoples tied time to the Moon, others to the Sun. If humanity chose two different clocks in the sky, which one keeps the 'true' time?
— calendar science, lunar and solar calendars
practice with this topic
Set the timer (5-30 min), take 20 seconds of prep if you like, start talking. Jot your thoughts onto the sticky-note board.
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