Passage: Alfred Kleiner (April 24, 1849 – July 3, 1916) was a Swiss physicist and Professor of Experimental Physics at the University of Zurich. He was Albert Einstein's doctoral advisor or Doktorvater. Initially Einstein's advisor was Heinrich F. Weber.  However, they had a major falling out, and Einstein chose to switch to Kleiner.

Question: when was Alfred kleiner born?
(April 24, 1849