Pope Benedict XVI was born on Holy Saturday of the Triduum in 1927. Joseph Aloisius Ratzinger was baptized that same day with the water blessed at the Vigil of Easter. Remember that ceremonies were held in anticipation in those days, so they had Baptismal Water and Easter Water on that same day Joseph was born.
There is a news piece in Italian at Vatican News.
Archbp. Gänswein said that there was not a party because it is Holy Saturday. Benedict won’t be principle celebrant for Easter because of his frailty, but he will concelebrate. Gänswein describes Benedict’s routine day: Mass and Office, breakfast, a break, correspondence and reading. There is time for music until lunch. A short rest in the afternoon and visits from guests. (I’d like to be one of those someday soon.) If he is up to it, a walk in the gardens and Rosary (seated). In the evening, the news and evening prayer.