I checked my profile today, and could see the I'm a user of this site "since 9 months".
But, at the bottom right of the profile page, I see:
It shows 12, 4 and 2 under month, week and day respectively. What is that suppose to mean?
"month" shows the number of votes since January 1, "week" the number of votes since January 6, and "day" shows today's votes. All the dates are UTC based, which means the day starts differently from what you consider your day; even in UK, the day coincide just in a specific period of time (not when UK uses UTC+1 as timezone).
For the days between January 1, and January 5, the votes were:
This is because the week on Stack Exchange always starts on Sunday, midnight UTC.