Will only be in Krakow on a weekend. Confusion about whether the 11:50 a.m. daily opening of the incredible altarpiece at St. Mary's occurs on Saturdays. Website says "weekdays" but then also discusses Sunday. No mention of Saturday. Do you know?
This is all I found on the website http://mariacki.com/en/tourists/:
St. Mary’s Church is open to individual
visitors and tourist groups every day when no Mass is being
conducted. Half of the church is open to tourists, including the
presbytery and its main altar. Admission to this part of the
Basilica is based on admission tickets. The second part of the
church with the main entrance is limited to personal prayer in
front of the Eucharist exhibited in the monstrance and to
Tours of St. Mary’s Tower
From April the 1st to October 31 Entrances from Tuesdays to
Saturdays: 9:10 AM – 5:30 PM (every 30 minutes) / Break from
11:30 AM to 1:10 PM
A lot of Europe includes Saturday in the "weekdays." Rick's guidebook (published June, 2015) says that it's open daily.