Today is Anzac Day and a public holiday in Australia. It is however much more than a public holiday.
The day commemorates the anniversary of the first major military action fought by Australian and New Zealand forces during the First World War but now recognises the lives lost in conflict all around the world since that time. So today will be a day of remembrance across Australia and New Zealand.
You can read a bit more about Anzac Day here in my post from 2014.