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As a PRTG User, I want to modify the first day of the week to comply with cultural differences.
Details of User Story
Having the option to select which day "starts the week" in Setup > Account Settings > My Account > Web Interface settings in the same vein as the Date Format customizations already available would be a boon to users (and others to whom this format is common) not to mention a reduction in translation errors for the visual-minded. It is always a tiny chore to adjust against the offset positions in the current, Monday-first visualization.