How are prayer and fasting times determined in a city located at 62 degrees north latitude, where the length of the day varies significantly between winter and summer?

If the prayer times are distinguishable by their legal signs, then it is obligatory to perform each prayer at its designated time and to fast the entire day, even if it is long. However, in countries where night and day are not distinguishable, or one of them is extremely long, then the prayer and fasting times must be estimated based on the closest countries to them where the times are distinguishable. It is permissible to break the fast if it causes severe hardship or harm, with the obligation to make up the fast on other shorter days.