Question: What is the phrase that is commonly used on the day which is observed on 25 April each year?

Related documents: [0]  [DOC] The phrase "Lest we forget" is commonly used in war remembrance services and commemorative occasions in English speaking countries, in particular Remembrance Day and ANZAC Day. Before the term was used in reference to soldiers and war, it was first used in a 1897 Christian poem written by Rudyard Kipling called "Recessional". The phrase occurs 8 times; and is repeated at the end of the first 4 stanzas in order to add particular emphasis regarding the dangers of failing to remember. [END] 
[1]  [DOC] Anzac Day is a national day of remembrance in Australia and New Zealand that broadly commemorates all Australians and New Zealanders "who served and died in all wars, conflicts, and peacekeeping operations" and "the contribution and suffering of all those who have served". Observed on 25 April each year, Anzac Day was originally to honour the members of the Australian and New Zealand Army Corps (ANZAC) who fought at Gallipoli against the Ottoman Empire during World War I. [END]  
Answer: "Lest we forget"
"Lest we forget"