When Ibsen died Wednesday, 23 May 1906 he had been sick for many years. The newspapers had for years had their obituaries prepared and as such many of them were already able to print an obituary in their evening edition (Ibsen died at 2:30 PM) on the same day of his death.
Obituary in Morgenbladet (Christiania) on Wednesday 23 May 1906.
Obituary for Ibsen by Georg Brandes in Politiken (Copenhagen) on Thursday 24 May 1906.
Obituary in The Times (London) on Thursday 24 May 1906 (No. 38,028, p. 5).
Obituary in New York Tribune on Thursday 24 May 1906.