Ruling · Ratha Saptamī · 2078

Friday 18 February

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 0 min 06 s away. 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 Friday 18 February

Taken. The only dawn Saptamī reaches.

05:21 aruṇodaya beginssunrise 07:06
Saptamī begins 05:21:02
04:5705:2105:4506:0906:3306:5707:21

105 of 105 minutes covered

Dawn of Saturday 19 February

Saptamī is absent from aruṇodaya. Not taken.

05:20 aruṇodaya beginssunrise 07:05
04:5605:2005:4406:0806:3206:5607:20

0 of 105 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 05:21 on Fri 18 Feb to 03:23 on Sat 19 Feb.

    2078-02-17T21:21:02Z → 2078-02-18T19:22:44Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 05:21–07:06 on the 18th, 05:20–07:05 on the 19th.

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

  3. 03

    Rule

    Saptamī must be present during aruṇodaya. It covers 105 of 105 minutes on the 18th and 0 of 105 on the 19th.

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

  4. 04

    Tie-break

    Only one dawn qualifies. No tie-break is needed.

    priority: unstated → only-day · margin 6 s < 300 s

  5. 05

    Ruling

    Ratha Saptamī, Baoding, 2078: Friday 18 February.

    confidence: boundary (margin)

Say it like this

In Baoding, Ratha Saptamī 2078 falls on Friday 18 February. Saptamī runs from 05:21 on Fri 18 Feb to 03:23 on Sat 19 Feb and covers all of aruṇodaya that dawn. It is 0 min 06 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/2078/ratha-saptami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 18 Feb
Ahargaṇa, classicalDisc centre, no refractionFri 18 Feb
compat-drikpanchangComparison profileFri 18 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 17thCoveredAruṇodaya 18thCoveredRuled
Los Angeles13:21 → 11:2304:520 min04:51103 min18 Feb
Chicago15:21 → 13:2304:570 min04:56106 min18 Feb
Jersey City16:21 → 14:2305:010 min05:00106 min18 Feb
Port of Spain17:21 → 15:2304:480 min04:4897 min18 Feb
London21:21 → 19:2305:190 min05:18110 min18 Feb
Durban23:21 → 21:2304:110 min04:1288 min18 Feb
Dubai01:21 → 23:2305:110 min05:10101 min18 Feb
Delhi02:51 → 00:5305:160 min05:15102 min18 Feb
Kolkata02:51 → 00:5304:270 min04:26100 min18 Feb
Singapore05:21 → 03:2305:410 min05:4195 min18 Feb
Sydney08:21 → 06:2305:060 min05:070 min19 Feb
Suva09:21 → 07:2304:300 min04:310 min19 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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