This just popped up on UOHerald.com. Looks like there is some work being done on the network side of things for some of the North American shards plus Oceania.
On Monday, March 14th, beginning at 8:00 AM EST we will bring down the following shards for a short network maintenance:
The expected downtime is 1.5 hours.
Thanks for your understanding.
This maybe ahead of the upcoming publish revolving around Magincia.