Days statistics "Days in month" are counted for the last 31 day. Weeks and months statistics are counted by calendar week and calendar month respectively.
Visitors
Number of unique visitors for the selected period. Visitor is a unique "Cookie", which is assigned to every user. If a user disabled cookies in the browsers a visit will not be counted.
Notes
Note: the daily statistics for "Days in month" and "s" is counted for last 7 and 31 day respectively. The weekly and monthly statistics is counted by calendar week and month respectively.