Karva Chauth

Hey

i have a question on the internet i cheked the date of Kava Chauth and it said that it is on monday

though everyone is celebrating it here today?
(i live in Canada)

and then when i went to get mehndi done yesterday they said that Karva Chauth is here today and tomorow in India.. (sunday here. monday there)

why is that ? and is that true?

please reply asap

people are doin it on both days.. my mom did it today..im in Canadaa too 😛