I'm not Catholic or Christian, so I'm a bit clueless about Palm Sunday and how significant it may be in Rome. We know that the Vatican is closed on Sundays, so we booked our admission for Saturday (April 4th). Aside from that, we're just going to see the usual major tourist attractions over a 3-day period.
Will anything be closed on Sunday April 5th just because it's Palm Sunday (if it is usually open on a Sunday)?
Also, near the end of our trip, we will be in Sienna on Easter Sunday. Do you think any restaurants will be open? I'm concerned we may not be able to get a meal that day! (We fly home the next day, which is Easter Monday).