Ruling · Ratha Saptamī · 2028

Thursday 3 February

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 379 minutes.

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 Wednesday 2 February

Saptamī is absent from aruṇodaya. Not taken.

05:34 aruṇodaya beginssunrise 07:25
05:1005:3405:5806:2206:4607:1007:3407:58

0 of 110 minutes covered

Dawn of Thursday 3 February

Taken. The only dawn Saptamī reaches.

05:34 aruṇodaya beginssunrise 07:24
05:1005:3405:5806:2206:4607:1007:3407:58

110 of 110 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 13:43 on Wed 2 Feb to 14:52 on Thu 3 Feb.

    2028-02-02T05:43:17Z → 2028-02-03T06:51:58Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 05:34–07:25 on the 2nd, 05:34–07:24 on the 3rd.

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

  3. 03

    Rule

    Saptamī must be present during aruṇodaya. It covers 0 of 110 minutes on the 2nd and 110 of 110 on the 3rd.

    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 22726 s

  5. 05

    Ruling

    Ratha Saptamī, Baoding, 2028: Thursday 3 February.

    confidence: determinate

Say it like this

In Baoding, Ratha Saptamī 2028 falls on Thursday 3 February. Saptamī runs from 13:43 on Wed 2 Feb to 14:52 on Thu 3 Feb and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/2028/ratha-saptami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 3 Feb
Ahargaṇa, classicalDisc centre, no refractionThu 3 Feb
compat-drikpanchangComparison profileThu 3 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 2ndCoveredAruṇodaya 3rdCoveredRuled
Los Angeles21:43 → 22:5205:02108 min05:020 min2 Feb
Chicago23:43 → 00:5205:11112 min05:100 min2 Feb
Jersey City00:43 → 01:5205:15111 min05:140 min2 Feb
Port of Spain01:43 → 02:5204:5199 min04:510 min2 Feb
London05:43 → 06:5205:40115 min05:3973 min2 Feb
Durban07:43 → 08:5204:010 min04:0284 min3 Feb
Dubai09:43 → 10:5205:180 min05:17104 min3 Feb
Delhi11:13 → 12:2205:240 min05:24105 min3 Feb
Kolkata11:13 → 12:2204:330 min04:33103 min3 Feb
Singapore13:43 → 14:5205:410 min05:4196 min3 Feb
Sydney16:43 → 17:5204:550 min04:5682 min3 Feb
Suva17:43 → 18:5204:240 min04:2589 min3 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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