If a sports player has a big pay day, he or she earns a lot of money from winning or taking part in a game or contest
Pay day is normally the first day of the month, except for supplemental payrolls When the first day of the month falls on a Saturday, Sunday or a holiday, payday is the prior workday
The date that the payroll payments are available in people's bank accounts (Also see banking date)
Pay day is the day of the week or month on which you receive your wages or salary. Until next payday, I was literally without any money