Ruling · Mahāśivarātri · 1910

Wednesday 9 March

Boundaryin Baoding, under the Rashtriya Panchang method. Caturdaśī reaches niśītha on neither day and the rule does not say what then. Say “contested”.

Decide it for

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

The two nights

One ghaṭī is 24 minutes. Niśītha is 1 ghaṭikā either side of midnight.

Night of Wednesday 9 March

Taken. Caturdaśī reaches neither night; this is the day it falls on.

niśītha begins 00:05  00:53 niśītha ends
23:1723:4100:0500:2900:5301:1701:41

0 of 48 minutes covered

Night of Thursday 10 March

Caturdaśī is absent from niśītha. Not taken.

niśītha begins 00:04  00:52 niśītha ends
Caturdaśī ends 23:21:02
23:1623:4000:0400:2800:5201:1601:40

0 of 48 minutes covered

Caturdaśī presentNiśītha, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Caturdaśī runs from 02:05 on Thu 10 Mar to 23:21 on Thu 10 Mar.

    1910-03-09T18:04:48Z → 1910-03-10T15:21:02Z

  2. 02

    Kāla

    Niśītha is 1 ghaṭikā either side of midnight: 00:05–00:53 on the 9th, 00:04–00:52 on the 10th.

    nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Caturdaśī must be present during niśītha. It covers 0 of 48 minutes on the 9th and 0 of 48 on the 10th.

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

  4. 04

    Tie-break

    Neither night qualifies. The day the tithi falls on is taken.

    priority: disputed → tithi-day · margin 2600 s

  5. 05

    Ruling

    Mahāśivarātri, Baoding, 1910: Wednesday 9 March.

    confidence: boundary (absent-unstated)

Say it like this

In Baoding, Mahāśivarātri 1910 falls on Wednesday 9 March. Caturdaśī runs from 02:05 on Thu 10 Mar to 23:21 on Thu 10 Mar, and reaches niśītha on neither day.

ahargana.org/baoding/festivals/1910/maha-shivaratri · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 9 Mar
Ahargaṇa, classicalDisc centre, no refractionWed 9 Mar
compat-drikpanchangComparison profileWed 9 Mar
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/maha-shivaratri · ruleset 2026.3-draft

Month
Māgha, amānta
Pakṣa · aṅga
Kṛṣṇa · Caturdaśī
Kāla
Niśītha
Priority
Disputed
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 105

“K 14 Mahasivaratri (nisithavyapini) — In some opinion it is to be observed on nisitha and in some opinion on pradosa. If occurs on two successive nisithas then according to Hemadri it is to be observed on the first day and according to Madhava, to be observed on the second day” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105. The alternative opinion that reads pradoṣa instead of niśītha is not evaluated.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceCaturdaśīNiśītha 9thCoveredNiśītha 10thCoveredRuled
Los Angeles10:05 → 07:2123:3948 min23:390 min9 Mar
Chicago12:05 → 09:2123:3748 min23:370 min9 Mar
Jersey City13:05 → 10:2123:4348 min23:420 min9 Mar
Port of Spain14:05 → 11:2123:5348 min23:520 min9 Mar
London18:05 → 15:2123:4748 min23:460 min9 Mar
Durban20:05 → 17:2123:4348 min23:430 min9 Mar
Dubai21:46 → 19:0223:4648 min23:460 min9 Mar
Delhi23:35 → 20:5100:0848 min00:070 min9 Mar
Kolkata23:35 → 20:5123:2336 min23:230 min9 Mar
Singapore01:05 → 22:2123:510 min23:510 min9 Mar
Sydney04:05 → 01:2123:420 min23:4248 min10 Mar
Suva06:00 → 03:1623:480 min23:4848 min10 Mar
Profile · tradition
pac-rp@2026.1 · smarta
Rule
maha-shivaratri@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

About Ahargaṇa