Because there are people who want to bid from all over the world, it would be a hassle if they had to keep converting time zones of the auctioneer to their time, especially if they are participating in multiple auctions at the same time
An example of this would be someone from GMT figuring out what time “XX:XX UTC-4” and “XX:XX EST” would be for them from two different auctions
It would be better if all auctioneers would use the Discord timestamps so that way it will automatically convert the end time to the bidder’s time zone. This will come with an additional step of just converting the time at a website
An exception to this are the ones that have end times of multiples of 24 (24,48,72 hours after auction posting)