Can anyone throw some light if someone works in US and stays in Canada(typical Detroit-Windsor model wherein people stay in Windsor,ON and then commute to Detroit for work),will the number of days be counted towards his citizenship or during the renewal of PR card?
For PR, the definition of day spent in Canada is any part of a day spent in Canada so if you commute every day, you are in Canada every day and will get full credit for time spent in Canada for PR residency requirements. It should be the same for citizenship.
You should however think about how you are planning on proving that you lived in Canada in case they ask. A lease on an apartment is not proof that you actually stayed there. You might have to think about keeping receipts, bank records, phone bills etc. to prove that you were actually staying at your Canadian apartment and were in Canada every day.
For PR, the definition of day spent in Canada is any part of a day spent in Canada so if you commute every day, you are in Canada every day and will get full credit for time spent in Canada for PR residency requirements. It should be the same for citizenship.
You should however think about how you are planning on proving that you lived in Canada in case they ask. A lease on an apartment is not proof that you actually stayed there. You might have to think about keeping receipts, bank records, phone bills etc. to prove that you were actually staying at your Canadian apartment and were in Canada every day.
It's not the same for citizenship. The definition of "day" is different for PR residency obligation and the citizenship physical presence requirement. For PR residency obligation, any day where you set foot in Canada counts as a full day. For Citizenship, a day-trip counts as no days absent, but if you leave one day and return the next, that counts as 1 day gone.
They are pretty strict on what counts as a Canadian company and you preferably have to have been working for them in Canada and they have transferred you to the US for it to work. If that is the case, then you can count your time working in the US for the Canadian employer as part of the 2 years you must spend in Canada in each 5 year period as a PR.
The same will not work for citizenship. For citizenship, you must have been in Canada for 3 years out of the last 4 before you apply.