The Centers for Medicaid and Medicare Services announced in a blog post on Monday that the ObamaCare website would be down so the Social Security Administration can conduct its annual systems maintenance activities.

The site will be out of order from 3 p.m. on Feb. 15 until 5 a.m. on Tuesday — a period that coincides with the long holiday weekend.

Those seeking coverage by March 1 must have signed up online by Feb. 15, but with the website down, those registering last-minute won’t be able to find out what plans or subsidies they qualify for.