I have 3-tier tariff:
Peak: 11a - 7p
Shoulder: 7a - 11a and 7p - 11p
Off-peak: 11p - 7a
When I click on the live chart, I will show the Peak and Shoulder range. However, it is off by one-hour. In my case, it will show Peak as 12p - 8p and Shoulder as 8a - 12p and 8p - 12a. Maybe it is caused by daylight saving time?
Does anyone notice this?