Wednesday 29 July

How it was decided

1. 01

   Aṅga

   Pūrṇimā runs from 18:19 on Tue 28 Jul to 20:06 on Wed 29 Jul.

   2026-07-28T12:49:28Z → 2026-07-29T14:35:43Z

2. 02

   Kāla

   Pradoṣa is 2 muhūrtas after sunset: 18:19–19:46 on the 28th, 18:19–19:45 on the 29th.

   pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′

3. 03

   Rule

   Pūrṇimā must be present during pradoṣa. It covers 86 of 86 minutes on the 28th and 86 of 86 on the 29th.

   Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102

4. 04

   Tie-break

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

   priority: unstated → greater-coverage · margin 3 s < 300 s

5. 05

   Ruling

   Śiva Śayanotsava, Kolkata, 2026: Wednesday 29 July.

   confidence: boundary (margin, tie-break-unstated)

Say it like this

In Kolkata, Śiva Śayanotsava 2026 falls on Wednesday 29 July. Pūrṇimā runs from 18:19 on Tue 28 Jul to 20:06 on Wed 29 Jul and covers all of pradoṣa that evening. It also reaches the previous evening for 86 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested. It is 0 min 03 s from a threshold: treat the date as contested.

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Who says what

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