Ruling · Mahāśivarātri (Shivratri) · 1964

Tuesday 11 February

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 184 minutes.

Decide it for

BaodingDelhiKolkataSingaporeSydneyJersey City

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 Tuesday 11 February

Taken. The only night Caturdaśī reaches.

niśītha begins 00:08  00:56 niśītha ends
23:2023:4400:0800:3200:5601:2001:44

48 of 48 minutes covered

Night of Wednesday 12 February

Caturdaśī is absent from niśītha. Not taken.

niśītha begins 00:08  00:56 niśītha ends
23:2023:4400:0800:3200:5601:2001:44

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 20:30 on Tue 11 Feb to 21:04 on Wed 12 Feb.

    1964-02-11T12:29:32Z → 1964-02-12T13:03:46Z

  2. 02

    Kāla

    Niśītha is 1 ghaṭikā either side of midnight: 00:08–00:56 on the 11th, 00:08–00:56 on the 12th.

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

  3. 03

    Rule

    Caturdaśī must be present during niśītha. It covers 48 of 48 minutes on the 11th and 0 of 48 on the 12th.

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

  4. 04

    Tie-break

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

    priority: disputed → only-day · margin 11062 s

  5. 05

    Ruling

    Mahāśivarātri, Baoding, 1964: Tuesday 11 February.

    confidence: determinate

Say it like this

In Baoding, Mahāśivarātri (Shivratri) 1964 falls on Tuesday 11 February. Caturdaśī runs from 20:30 on Tue 11 Feb to 21:04 on Wed 12 Feb and covers all of niśītha that night.

ahargana.org/baoding/festivals/1964/maha-shivaratri · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 11 Feb
Ahargaṇa, classicalDisc centre, no refractionTue 11 Feb
compat-drikpanchangComparison profileTue 11 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/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 11thCoveredNiśītha 12thCoveredRuled
Los Angeles04:30 → 05:0423:4348 min23:430 min11 Feb
Chicago06:30 → 07:0423:4148 min23:410 min11 Feb
Jersey City07:30 → 08:0423:4648 min23:460 min11 Feb
Port of Spain08:30 → 09:0423:5648 min23:560 min11 Feb
London12:30 → 13:0423:5048 min23:500 min11 Feb
Durban14:30 → 15:0423:4648 min23:460 min11 Feb
Dubai16:30 → 17:0400:0948 min00:090 min11 Feb
Delhi18:00 → 18:3400:1148 min00:110 min11 Feb
Kolkata18:00 → 18:3423:2748 min23:270 min11 Feb
Singapore20:00 → 20:3400:2548 min00:250 min11 Feb
Sydney22:30 → 23:0423:4648 min23:460 min11 Feb
Suva00:30 → 01:0423:5715 min23:5748 min12 Feb
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