Anzac Day. This year, as we mark 100 years since the Gallipoli campaign, the occasion resonates a lot louder than in most years.
But separated from the event by 100 years and 10,000 miles, it's harder and harder to comprehend its scale and devastation and thus its significance in this nation's history.
So we talk about it, we remember it, inasmuch as we can - the tales, anecdotes, horror stories and memories of our past and our relatives' pasts - and we read about it and watch it and hear about it, in the newspaper, online and on the telly and radio.
We take part in ceremonies and activities and pay respects to people of another time, not just because they were our relatives, but because they were New Zealanders and contributed to a major part of our collective history.
For my part, two grandfathers went to war and came back. My mother's grandfather on her dad's side fought in World War I.