AZOST — Azores Summer Time
See what AZOST means, when it is used as daylight saving time, and how to compare or convert it with other time zones.
How to Convert AZOST to Other Time Zones
Open the AZOST converter page: Visit https://www.xconvert.com/time-converter/azost-time-zone to load the visual comparison grid with Azores Summer Time (AZOST) as the reference row. This page is useful when you are scheduling a call with teams in mainland Europe, coordinating Atlantic flight timing, or checking whether a support shift in the Azores overlaps with London or New York business hours.
Add comparison cities with the + Add City button: Click “+ Add City” and search for cities such as Lisbon, London, and New York to compare AZOST against major finance, airline, and remote-work hubs. This is especially practical because the Azores are one hour behind mainland Portugal in summer, aligned with UTC+0, so adding Lisbon quickly shows the difference between island operations and offices on the continent.
Drag across the grid to select a meeting window: Click “Select” if needed, then drag across the AZOST row from 9:00 AM to 11:00 AM AZOST to highlight that range in purple. That selection shows, for example, 10:00 AM to 12:00 PM in Lisbon during WEST, and 5:00 AM to 7:00 AM in New York during EDT, which helps confirm that an Azores morning meeting works for Europe but is very early for the U.S. East Coast.
Export the selected time range: After selecting the range, use the export options shown on the page: ICS download, Google Calendar, Gmail, Copy to clipboard, or Share link. This is useful if you want to send a confirmed meeting slot to a distributed team, create a calendar event that appears in each participant’s local time automatically, or share a live link with travel coordinators handling Atlantic connections.
About Azores Summer Time (AZOST)
AZOST stands for Azores Summer Time, the daylight saving time observed in the Azores, an autonomous region of Portugal located in the North Atlantic Ocean. Its exact offset is UTC+0:00, which means clocks in AZOST show the same time as Coordinated Universal Time while summer time is in effect.
The Azores are geographically west of mainland Portugal, and their seasonal time pattern is different from the Portuguese mainland. During summer, the Azores move from AZOT (Azores Standard Time, UTC-1) to AZOST (UTC+0), while mainland Portugal typically moves from WET (UTC+0) to WEST (UTC+1), so the islands remain one hour behind Lisbon even during daylight saving time.
AZOST has the same UTC offset as several other abbreviations listed at UTC+0, including GMT, WET, WT, EGST, and Z, but these labels are not interchangeable in every context. AZOST specifically refers to the summer daylight saving period in the Azores, while GMT is generally a standard-time reference and Z is commonly used in aviation, military, and ISO timestamp formats.
Although no principal cities were provided in your source data, AZOST is used across the inhabited islands of the Azores, including regional centers such as Ponta Delgada, Angra do Heroísmo, and Horta during the summer period. This matters for travelers booking flights through the archipelago and for businesses coordinating with Portugal, Europe, and North America, because the Azores sit in a strategic mid-Atlantic position.
AZOST and Daylight Saving Time
AZOST is a daylight saving time zone, not a year-round standard time. It is used when the Azores advance clocks by one hour from AZOT (UTC-1) to AZOST (UTC+0) for the warmer part of the year.
In the current year, 2026, the Azores switch to AZOST on Sunday, March 29, 2026, when clocks move forward by one hour at the start of the DST period. They switch back to AZOT on Sunday, October 25, 2026, when clocks move back by one hour and the islands return to UTC-1.
This seasonal change affects cross-border scheduling in practical ways. For example, during AZOST, the Azores match UTC/GMT clock time, remain 1 hour behind Lisbon when Portugal is on summer time, and are typically 4 hours ahead of New York during U.S. daylight saving time, meaning 9:00 AM in the Azores is 5:00 AM in New York and 10:00 AM in Lisbon.
Because DST transition dates in the Azores follow the European pattern of changing on the last Sunday in March and the last Sunday in October, missed meetings often happen around those weeks if one side assumes GMT year-round. For remote teams, airline dispatchers, and customer support managers, checking the exact date on the converter before confirming a recurring meeting can prevent a one-hour error.
Frequently Asked Questions
What does AZOST stand for?
AZOST stands for Azores Summer Time. It is the daylight saving time used in Portugal’s Azores region when clocks are advanced from UTC-1 to UTC+0 for the summer season.
Is AZOST the same as GMT?
AZOST has the same clock offset as GMT, which is UTC+0, but it is not the same thing in naming or seasonal meaning. GMT is commonly treated as a standard reference time, while AZOST specifically refers to the summer daylight saving period in the Azores.
Which cities use AZOST?
AZOST is used in the Azores archipelago, an autonomous region of Portugal in the Atlantic Ocean. During the summer period, places such as Ponta Delgada, Angra do Heroísmo, and Horta observe AZOST, which is important for ferry schedules, regional flights, tourism operations, and coordination with mainland Portugal.
What is the UTC offset for AZOST?
The UTC offset for AZOST is UTC+0:00. That means local clock time in AZOST is the same as UTC during daylight saving time, even though the Azores are normally on AZOT, UTC-1, outside the DST season.
When does AZOST change?
In 2026, AZOST begins on March 29, 2026 and ends on October 25, 2026. On the March transition, clocks move forward by one hour from AZOT to AZOST; on the October transition, clocks move back by one hour from AZOST to AZOT.
Is AZOST the same as UTC?
During the summer period, AZOST shows the same current clock time as UTC because its offset is UTC+0. However, AZOST is a regional daylight saving designation for the Azores, while UTC is the global time standard used for scientific, technical, aviation, and international scheduling systems.
How far ahead is AZOST compared with Lisbon?
During the summer, AZOST is 1 hour behind Lisbon, because the Azores are on UTC+0 while Lisbon is typically on WEST (UTC+1). So when it is 9:00 AM in the Azores, it is usually 10:00 AM in Lisbon, which is important for government coordination, banking calls, and mainland-island business operations.
Does AZOST observe daylight saving time every year?
Yes, AZOST is itself the daylight saving time period used each year in the Azores. The region normally follows the European DST cycle, switching to summer time on the last Sunday in March and returning to standard time on the last Sunday in October, unless legislation changes in the future.