[zenith]

Buying 1 donator day is prorated for how long it will last. Days end at midnight server time, and several players in the past purchased days at 20 credits to have them last only 2 minutes.

You purchased yours at around 10:30am, so you had more than half of the day to go. We have had several players purchase them for 1 credit, but they buy them near the end of the day when they don't last very long.