Karva Chauth 2026 falls on Thursday, October 29 in India. Some panchang calculations for North America place the observance a day earlier, on Wednesday, October 28, since the relevant Chaturthi tithi may already be prevailing at moonrise there a day sooner local time. Check which date your family’s local panchang or community follows.
Toronto and Vancouver need separate calculations
Both cities are in Canada, but Toronto sits on Eastern time and Vancouver on Pacific time, a roughly 3-hour official gap, plus their longitudes differ enough that moonrise falls at its own distinct local hour in each. An estimate for Toronto is not a safe substitute for Vancouver’s actual moonrise, and vice versa.
Dublin’s moonrise
Ireland shares the same time zone as the UK and sits at a similar longitude, so Dublin’s moonrise time tends to track closely with London’s, typically within a few minutes. Still, “close” is not the same as “identical,” and for a precise fasting window it is worth checking Dublin’s own figure rather than substituting London’s directly.
Fasting window
The nirjala (waterless) fast traditionally runs from sunrise to moonrise. In late October, sunrise and moonrise both shift noticeably compared to summer months, so it is worth checking both ends of the window a day or two ahead rather than relying on a rough memory of last year’s timing.
The late-October weather factor
This is something nobody in India thinks about but it matters a lot in Canada and Ireland. Late October in Toronto means the moon might rise behind thick cloud cover, and in Vancouver it is the peak of the rainy season. Dublin in late October is equally unpredictable. The fast does not break on seeing the moon through a window. It breaks on sighting the moon, and if the sky is overcast for hours, that creates real practical stress for someone who has been fasting without water since sunrise. Families in these cities should have a plan for this. Some use a confirmed astronomical moonrise time as the reference point and break the fast at that time regardless of whether the moon is physically visible through the clouds, reasoning that the moon has risen even if it cannot be seen. Others wait. There is no universal ruling on this, and different families handle it differently. Knowing the precise moonrise time for your city becomes even more important when cloud cover is likely, because it gives you a definitive reference point rather than standing outside in the cold hoping for a gap in the clouds.
Sargi timing in a different time zone
Sargi, the pre-dawn meal eaten before the fast begins, is traditionally eaten before sunrise, while it’s still dark. In late October, sunrise in Toronto is around 7:35 AM and in Dublin closer to 7:45 AM, noticeably later than the Indian sunrise most families grew up associating with sargi. This trips up mothers-in-law calling from India who assume sargi should be eaten by 5 or 6 AM. It doesn’t need to be. The rule is tied to sunrise, not a fixed clock hour, so a 6:45 AM sargi in Toronto in late October is on schedule.
What families do when the fast runs long
Moonrise in these cities can land anywhere from about 6:30 PM to past 8:00 PM depending on date and location, so some fasts run 12 hours, others closer to 13 or 14, longer than many are used to from an Indian Karva Chauth. For anyone managing a health condition that makes an extended waterless fast risky, such as diabetes or pregnancy, plan meals and any medically necessary exceptions around the confirmed moonrise time for your city rather than a shorter, India-based estimate.
Confirm for your exact city
Use the panchang page with your Canadian or Irish city selected to confirm the tithi and general timing; for the precise moonrise minute, cross-check with a local astronomical source close to the date.