UTC to AST Converter

Use our converter below to change times between UTC (UTC) to Atlantic Standard Time (AST). If you mixed up your time zones and would like to convert AST to UTC instead, you can find that converter here: Atlantic Standard Time to UTC Converter. And if you don't like either of our tools, then go back to see all of our time zone converters.

Convert Time


UTC, or Coordinated Universal Time, is the primary time standard used around the world. It doesn't have any associated cities, as it serves as the basis for calculating time differences between different time zones.


Atlantic Standard Time

Atlantic Standard Time (AST) is the time zone used in some eastern parts of Canada, including cities like Halifax and Moncton. It is 4 hours behind UTC during standard time and 3 hours behind during daylight saving time.


  • Halifax
  • Moncton
  • Saint John
  • Charlottetown

How to convert time from UTC (UTC) to Atlantic Standard Time (AST)

Converting between UTC (UTC) and Atlantic Standard Time (AST) could be challenging. As companies become more global, we find ourselves in a mess of calendar invites. Time changes from UTC cities like are -2 hour(s) apart to AST cities like Halifax, Moncton, Saint John, Charlottetown, holiday schedules, and the basic communication becomes a juggling act. To make it easier to understand, we'll break down the process of converting time between UTC and AST into step-by-step instructions.

Understanding UTC and Atlantic Standard Time

UTC is UTC0, which means that the local time in the UTC zone is 0 hours apart from UTC. Atlantic Standard Time is UTC-3, which means that the local time in the Atlantic Standard Time zone is -3 hours apart from UTC.

Calculate the Time Difference

To convert time from UTC to Atlantic Standard Time, we first need to find the time difference between both time zones. Since UTC is UTC0 and Atlantic Standard Time is UTC-3, the time difference is: -2 hour(s)

  • -2 hours = UTC's difference from UTC -3 + (Atlantic Standard Time's difference from UTC 0
  • Atlantic Standard Time has -2 hour(s) difference UTC.

Step 3: Add the Time Difference to the UTC Time

To convert a specific time from UTC to Atlantic Standard Time, we simply add the time difference (-2 hours) to the UTC time. Make sure to also adjust the day if the converted time goes past midnight. Or if you are using 24-hour time or Military Time, ensure you’re using the correct attributes.

Step 4: Practice Converting Times

Now that you know the process, try converting different times from UTC to Atlantic Standard Time for practice before going to the answer page. Remember to always add the Atlantic Standard Time time difference to the UTC time.

Scheduling a meeting between UTC and Atlantic Standard Time

When scheduling a meeting between employees in the UTC and Atlantic Standard Time zones, there are several factors to consider to ensure that the meeting is convenient and productive for all participants. Here's a detailed breakdown of what you should consider before scheduling across time zones:

  • Convert Time Difference: As we've discussed earlier, Atlantic Standard Time is -2 ahead of UTC. It's crucial to take this time difference into account when scheduling a meeting to avoid scheduling conflicts or creating meetings at odd or inappropriate hours. In my experience, accidentally scheduling a meeting a 4am is awkward.
  • Overlapping Working Hours: To find a suitable time for the meeting, you’ll need to identify the overlapping working hours between the two time zones. For example, if employees in both zones work from 9:00 AM to 5:00 PM local time, the overlapping hours could be between 9:00 AM and 11:00 AM UTC but -2 hours different to Atlantic Standard Time. Be upfront with Atlantic Standard Time employees to find the right time.
  • Consideration of Local Holidays: Be mindful of local UTC and Atlantic Standard Time holidays, festivals, or observances in both time zones. These events might affect employee availability or working hours. Check local calendars for both the UTC and Atlantic Standard Time zones to avoid scheduling conflicts.
  • Communicate Time Zone Differences: Clearly communicate the meeting time in both UTC and Atlantic Standard Time to avoid confusion. Using a tool like an online meeting planner or time zone converter can help simplify the process and ensure accuracy.

Converting time zones across other countries

The process of converting time between two time zones is similar regardless of the countries involved. You'll need to determine the time difference between the two zones and add it to the time in the first zone. Keep in mind that some countries may observe daylight saving time or have different time zones within the country. It's important to double-check the time difference before scheduling any meetings or events.