When Is the Long Weekend in September? (Context Needed)

The provided information does not specify which country, year, or holiday you're referring to. "Long weekend in September" varies:

• USA: Labor Day (first Monday).
• Canada: Labour Day (first Monday).
• UK: No national September holiday (Scotland sometimes has late Sept).
• Australia: None nationally (some states have King's Birthday in Sept/Oct).

Please specify the country and year for an exact date.