Noun
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.org2001 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. Source: Internet
My Big Day: Home or Away? Source: Internet
“Our Big Day Today” read the subject line of the message, which went to thousands of EPA employees. Source: Internet
Tara Fay and Bruce Russell in My Big Day: Home Or Away? Source: Internet
What is a Big Day? Source: Internet
Sydney Festival is Australia's largest arts festival. citation Big Day Out is a travelling rock music festival that originated in Sydney. Source: Internet