These days, if you open your google homepage Google New Zealand or Australia, you can see a small red poppy under the google logo as shown above. It was in commemoration of Anzac Day.
Anzac Day is a national day of remembrance in Australia and New Zealand, originally commemorated by both countries on 25 April every year to honour the members of the Australian and New Zealand Army Corps (ANZAC) who fought at Gallipoli in the Ottoman Empire during World War I. It now more broadly commemorates all those who died and served in military operations for their countries.
Anzac Day is also observed in the Cook Islands, Niue, Pitcairn, and Tonga. It is no longer observed as a national holiday in Papua New Guinea and Samoa.
Poppies, a symbol of remembrance
In Australia and New Zealand, Anzac Day commemoration features solemn "Dawn Services", a tradition started in Albany, Western Australia on 25 April 1923 and now held at war memorials around both countries, accompanied by thoughts of those lost at war to the ceremonial sounds of The Last Post on the bugle. The fourth stanza of Laurence Binyon's poem For the Fallen (known as the "Ode of Remembrance") is often recited.
more detail about Anzac Day, you can read in wikipedia.