big day
Noun
Meaning
The day of one's wedding.
Any day on which something significant or momentous happens.
A birding event in which teams compete against one another to see as many different bird species as possible in a certain area over the course of a day or part thereof.
Source: en.wiktionary.orgExamples
2001 was a busy year for Rammstein, starting in January and February with the band playing the Big Day Out festival in Australia and New Zealand.
My Big Day: Home or Away?
“Our Big Day Today” read the subject line of the message, which went to thousands of EPA employees.
Tara Fay and Bruce Russell in My Big Day: Home Or Away?
What is a Big Day?
Sydney Festival is Australia's largest arts festival. citation Big Day Out is a travelling rock music festival that originated in Sydney.