Ruling · Ratha Saptamī · 2022

Tuesday 8 February

Boundaryin Baoding, under the Rashtriya Panchang method. Both dawns qualify and the rule does not say which to take. Say “contested”.

Decide it for

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two dawns

One ghaṭī is 24 minutes. Aruṇodaya is 2 muhūrtas before sunrise.

Dawn of Monday 7 February

Qualifies with 11 of 109 minutes. Not taken.

05:31 aruṇodaya beginssunrise 07:19
Saptamī begins 07:08:29
05:0705:3105:5506:1906:4307:0707:31

11 of 109 minutes covered, the last 11

Dawn of Tuesday 8 February

Taken. Both dawns qualify; the rule is silent, and this one is covered longer.

05:30 aruṇodaya beginssunrise 07:18
05:0605:3005:5406:1806:4207:0607:30

108 of 108 minutes covered

Saptamī presentAruṇodaya, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Saptamī runs from 07:08 on Mon 7 Feb to 08:47 on Tue 8 Feb.

    2022-02-06T23:08:29Z → 2022-02-08T00:46:31Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 05:31–07:19 on the 7th, 05:30–07:18 on the 8th.

    arunodaya: prev-night-muhurta-14-15 · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Saptamī must be present during aruṇodaya. It covers 11 of 109 minutes on the 7th and 108 of 108 on the 8th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105

  4. 04

    Tie-break

    Both dawns qualify and the rule marks neither. The one covered longer is ruled, as a boundary.

    priority: unstated → greater-coverage · margin 645 s

  5. 05

    Ruling

    Ratha Saptamī, Baoding, 2022: Tuesday 8 February.

    confidence: boundary (tie-break-unstated)

Say it like this

In Baoding, Ratha Saptamī 2022 falls on Tuesday 8 February. Saptamī runs from 07:08 on Mon 7 Feb to 08:47 on Tue 8 Feb and covers all of aruṇodaya that dawn. It also reaches the previous dawn for 11 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested.

ahargana.org/baoding/festivals/2022/ratha-saptami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 8 Feb
Ahargaṇa, classicalDisc centre, no refractionTue 8 Feb
compat-drikpanchangComparison profileTue 8 Feb
No institution has a recorded ruling for Baoding.

Institutional rulings are recorded with a source address, and are never edited to agree.

The rule, as data

/rules/ratha-saptami · ruleset 2026.3-draft

Month
Māgha, amānta
Pakṣa · aṅga
Śukla · Saptamī
Kāla
Aruṇodaya
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 105

“S 7 Ratha saptami (covering 4 ghatikas before sunrise), Acala saptami, Vidhana saptami, Arogya saptami [purvaviddha].” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceSaptamīAruṇodaya 6thCoveredAruṇodaya 8thCoveredRuled
Los Angeles15:08 → 16:4705:000 min04:580 min7 Feb
Chicago17:08 → 18:4705:080 min05:060 min7 Feb
Jersey City18:08 → 19:4705:120 min05:100 min7 Feb
Port of Spain19:08 → 20:4704:500 min04:500 min7 Feb
London23:08 → 00:4705:350 min05:320 min7 Feb
Durban01:08 → 02:4704:040 min04:050 min7 Feb
Dubai03:08 → 04:4705:160 min05:150 min7 Feb
Delhi04:38 → 06:1705:220 min05:2155 min7 Feb
Kolkata04:38 → 06:1704:320 min04:31102 min8 Feb
Singapore07:08 → 08:4705:410 min05:4196 min8 Feb
Sydney10:08 → 11:4704:580 min05:0084 min8 Feb
Suva11:08 → 12:4704:260 min04:2790 min8 Feb
Profile · tradition
pac-rp@2026.1 · smarta
Rule
ratha-saptami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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