Day of Tuesday 13 April
Taken. The transit falls in this day.
05:53 sunrisenext sunrise 05:51
Sun enters Meṣa 05:02:49
05:2909:2913:2917:2921:2901:2905:29
Falls in this day
Ruling · Vaiśākhī · 2021
Determinatein Datong, under the Rashtriya Panchang method. Clear of every threshold by 48 minutes.
A tick is five ghaṭīs, two hours. The day is sunrise to the next sunrise.
Day of Tuesday 13 April
Taken. The transit falls in this day.
Falls in this day
Day of Wednesday 14 April
The transit does not fall in this day. Not taken.
Does not fall in this day
Aṅga
The Sun enters Meṣa at 05:03 on Wed 14 Apr.
2021-04-13T21:02:50Z · nirayana, lahiri-iae1985
Kāla
The day runs from sunrise to the next sunrise: from 05:53 on the 13th, and from 05:51 on the 14th.
day: sunrise-to-sunrise · sunrise: upper limb, 31′ + 16′
Rule
The festival is kept on the day of the transit, the day counted from sunrise. The transit falls on the 13th, not the 14th.
Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 106
Tie-break
An instant falls in one day and no other. No tie-break is needed.
day counted from sunrise → only-day · margin 2894 s
Ruling
Vaiśākhī, Datong, 2021: Tuesday 13 April.
confidence: determinate
In Datong, Vaiśākhī 2021 falls on Tuesday 13 April. The Sun enters Meṣa at 05:03 on Wed 14 Apr, and the rule counts the day from sunrise. Counted from midnight, or by the Tamil rule for the first day of a solar month, which gives a transit after sunset to the next day, it is 14 April.
| Authority | Kind | Date |
|---|---|---|
| Ahargaṇa, pac-rp | This ruling | Tue 13 Apr |
| Ahargaṇa, classical | Disc centre, no refraction | Tue 13 Apr |
| compat-drikpanchang | Comparison profile | Tue 13 Apr |
| Counted from midnight | CRC 1955, p. 106 | Wed 14 Apr |
| Past sunset, the next day (the Tamil rule) | CRC 1955, p. 244 | Wed 14 Apr |
| No institution has a recorded ruling for Datong. | ||
Institutional rulings are recorded with a source address, and are never edited to agree.
/rules/vaishakhi · ruleset 2026.3-draft
“Mesadi — Cadaka puja (Bengal), Bahag Bihu (Assam), Cheiraoba (Manipur), Visu (T. C. State), Vaisakhi (on the samkramana day commencing from sunrise).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 106. “The following festivals are observed according to the day of Sun's transit into rasis (Ravi-samkramana). For this purpose the day has been taken to begin from midnight, i.e., when the samkramana takes place after midnight, the festival relating to the samkramana is to be observed on the following day.” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 106. The other names in the row (Cadaka puja, Bahag Bihu, Cheiraoba, Visu) are regional observances and wait with the regional rows.
Twelve places, west to east. Local clock times.
| Place | Sun enters Meṣa | Sunrise 13th | Covered | Sunrise 14th | Covered | Ruled |
|---|---|---|---|---|---|---|
| Los Angeles | 14:03 | 06:24 | falls | 06:23 | no | 13 Apr |
| Chicago | 16:03 | 06:13 | falls | 06:12 | no | 13 Apr |
| Jersey City | 17:03 | 06:21 | falls | 06:19 | no | 13 Apr |
| Port of Spain | 17:03 | 05:56 | falls | 05:56 | no | 13 Apr |
| London | 22:03 | 06:09 | falls | 06:07 | no | 13 Apr |
| Durban | 23:03 | 06:14 | falls | 06:15 | no | 13 Apr |
| Dubai | 01:03 | 05:59 | falls | 05:58 | no | 13 Apr |
| Delhi | 02:33 | 05:58 | falls | 05:57 | no | 13 Apr |
| Kolkata | 02:33 | 05:19 | falls | 05:18 | no | 13 Apr |
| Singapore | 05:03 | 07:01 | falls | 07:01 | no | 13 Apr |
| Sydney | 07:03 | 06:16 | no | 06:17 | falls | 14 Apr |
| Suva | 09:03 | 06:15 | no | 06:16 | falls | 14 Apr |