# astronomical dating system

drillable.com › aa-usno-navy-mil › easter › astronomical dating system.
As of the index built 10 Sep 2026, 05:14 UTC · [cites, never asserts](/standing).
Source: The Date of Easter, by https://aa.usno.navy.mil.
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## Records (3)

By drillable.com ([llm-extract/1](/standing#methods)); scored precision 1.00, recall 0.33 on the harness's last sample of 33.

- **date** = 18th century · [quote](/r/sha256:f2b6937ef225beb3ce31c31367c764315bb5626a6619fc7bdc947d07704d3c9f?trace&start=6859&end=6930) · [sha256:90698c783f463625…](/r/sha256:90698c783f4636258c410faa478f00ef974f0e6ad5585ead1b10231419207fee)
- **definition** = AD 1 is designated +1 and is preceded by year 0 · [quote](/r/sha256:f2b6937ef225beb3ce31c31367c764315bb5626a6619fc7bdc947d07704d3c9f?trace&start=6704&end=6785) · [sha256:8a3851d915fac83f…](/r/sha256:8a3851d915fac83f3515acb7cbd8d75a9a1d041fd370194774835c50547be745)
- **definition** = AD 1 is designated +1 and is preceded by year 0 [superseded] · [quote](/r/sha256:cb39d9770f091705917adc1e440f69d156550c9d26bc683f153e45b2cb1e787e?trace&start=6518&end=6593) · [sha256:c98905e9eceaddb9…](/r/sha256:c98905e9eceaddb9bc7be6383f0ebfb09c14b7260b7cab023f8b513e49a3158c)

Everything here is a record by a named reader, arranged; where readers disagree, both are shown.
No reader has asserted a label for it; the title is its address.

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