# gregorian to julian formula

drillable.com › aa-usno-navy-mil › easter › gregorian to julian formula.
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.
MCP https://mcp.drillable.com · [html](/e/aa-usno-navy-mil/easter/gregorian-to-julian-formula.html) · [markdown](/e/aa-usno-navy-mil/easter/gregorian-to-julian-formula.md) · [json](/e/aa-usno-navy-mil/easter/gregorian-to-julian-formula.json) · [discovery](/.well-known/drillable.json) · [guide](/llms.txt)

## Records (4)

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

- **formula** = JD = 367K - <(7(K+<(M+9)/12>))/4> + <(275M)/9> + I + 1721013.5 + UT1/24 - 0.5sign(100K+M-190002.5) + 0.5 · [quote](/r/sha256:0ea06c460e132dce27767749331ab2b7649d9da866cdf6c1b89434770c6a2421?trace&start=2355&end=2460) · [sha256:c8b2bc6eae6a0b8d…](/r/sha256:c8b2bc6eae6a0b8da9c6fe372884c8763ef3755999b78c5e1076eaa8c08f37e0)
- **note** = the last two terms add up to zero for all dates after 1900 February 28, so these two terms can be omitted for subsequent dates · [quote](/r/sha256:0ea06c460e132dce27767749331ab2b7649d9da866cdf6c1b89434770c6a2421?trace&start=2655&end=2797) · [sha256:15b0763854b593a3…](/r/sha256:15b0763854b593a389791e4609ec4e3cc4c37d5385468daa7f6ab534a726ab9a)
- **period** = AD 1801–2099 · [quote](/r/sha256:0bd3a72cedd1d87b41bd9877a952019a12b35393c2f2b5dad08dea44d1ef3d36?trace&start=2296&end=2420) · [sha256:7644ce9d53276131…](/r/sha256:7644ce9d532761311fb9ac08c1bce60e332e462a0c41e8ff7a5ec9104b7ecdda)
- **range** = 1801 to 2099 · [quote](/r/sha256:0ea06c460e132dce27767749331ab2b7649d9da866cdf6c1b89434770c6a2421?trace&start=2230&end=2354) · [sha256:27190f78528eda45…](/r/sha256:27190f78528eda45e97a0753117d6a96e084e48a1676d65a90f0a757f7855cc6)

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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