The medieval 'moment' was not a fixed minute but a fluid measure tied directly to daylight. Because the length of a 'solar hour'—the twelfth part of the time between sunrise and sunset—changed with the seasons, the duration of a moment also stretched and contracted throughout the year. This system, used primarily by scholars and monks for liturgical and astronomical calculations, meant a 'moment' in the long days of summer was longer than one in the short winter afternoons. The Venerable Bede re

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