Related terms:
proleptic gregorian
since the epoch
there are exactly
elapsed since
royal greenwich observatory
ordinal date
leap seconds
astronomical year
simon newcomb
calendar date
days per
herstmonceux
julian year
unix time
naval observatory
astronomer royal
julian date
timezone
Wikipedia sources:
Simon Newcomb
Royal Observatory, Greenwich
Julian day
Nautical almanac
Context for words:
nautical
almanac
office
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