Sunday (/ˈsʌndeɪ/ or /ˈsʌndi/) is the day of the week following Saturday but before Monday. For most Christians, Sunday is observed as a day of worship and rest, holding it as the Lord's Day and the day of Christ's resurrection. Sunday is a day of rest in most Western countries, part of 'the weekend'. In some Muslim countries and Israel, Sunday is the first work day of the week.