- Plesk for Windows
There are no web statistics logs on server for a particular date or before that.
Are the log files of the other dates renamed and statistics calculated?
The log files are removed due to log rotation settings for the domain: it is set to 0 files and to be rotated based on the log size. Old files that are more than the defined size get removed. The statistics are calculated for the dates for which the logs were not removed.
The settings can be modified at Domains > example.com > Logs > Log Rotation
More details can be found here: