I used to be on the east coast and had to remember to do my duolingo review by midnight or I would lose my streak. Since I've moved to the west coast I've been having a few issues with the streak calculation. I have the streak saving lingot thing activated. Twice in the last week I've missed the midnight eastern deadline and completed it and hour or so late but before midnight pacific. My iPhone app has reset the streak to zero, on the website my streak was not reset and my lingot streak saver had to be repurchased. Strangely though on both the website (weekly progress bar in profile) and the end of review line graph, it shows that I completed a review session every day (which I did in pacific time). Any way we can change what time the day 'expires'?