UTC−03:30 is an identifier for a time offset from UTC of −03:30. It is used in the Canadian province of Newfoundland and Labrador as Newfoundland Time Zone.

As standard time (Northern Hemisphere winter) Principal city: St. John's

North America Canada – Newfoundland Time Zone Newfoundland and Labrador Labrador The area between L'Anse-au-Clair and Norman Bay Newfoundland

Historical use It was also used in Uruguay as standard time between 1 April 1924 and 14 March 1942, with DST being a half-hour offset with clocks set to UTC−03:00, and in Suriname between 1 October 1945 and 1 October 1984.IANA time zone database, available via https://www.iana.org/time-zones

References