Why I Set All My Devices to UTC When I Travel
When I travel, I set every device to UTC. Phone, watch, laptop. All of them. It sounds weird. It was weird for the first two days. Now I wouldn't do it any other way.
Why I Started
I used to keep my devices on home time when traveling. "It helps me stay connected to home," I told myself. But it created a weird dual-brain problem: my watch said one thing, my phone said another, and the world around me said a third. I was constantly converting.
Then a pilot friend told me he does the opposite: everything in UTC. I tried it. It clicked.
How It Works
Let's say I'm in Tokyo (UTC+9). My phone shows 3:00 PM UTC. I know Tokyo is +9, so it's midnight local time. I know my family is in London (UTC+0 in winter), so it's 3:00 PM there — a good time to call. I know my colleague in New York (UTC-5) is at 10:00 AM UTC, so it's 5:00 AM there — too early.
The math is simple: UTC offset = local time. I do it once when I arrive and then I'm set.
The Two-Day Adjustment
The first two days are strange. You look at your phone and it says "14:00" when it's clearly morning. Your brain rebels. But by day three, you've internalized the offset. You see "14:00" and you just know it's 11 PM in Bangkok without thinking about it.
Why It's Better Than Local Time
When you set your phone to local time, you lose connection to your home timezone. You have to calculate: "It's 9 PM here, so that's 3 PM at home." With UTC, the calculation is the same everywhere: "It's 14:00 UTC, home is UTC+0, so it's 14:00 at home." No special case for your current location.
And when you're coordinating across multiple time zones — say you're in Bangkok but your team is in London and New York — UTC is the natural reference. Everyone can convert from UTC. Not everyone can convert from Bangkok time.
The One Exception
I do set my watch to local time when I'm in one place for more than a week. After a week, the mental overhead of converting to local time is worth it for daily life. Restaurant reservations, meeting friends, dentist appointments — these are in local time and I don't want to mess up.
But for short trips (under a week), UTC everything. It's the only way I travel now.
The DST Trap It Avoids
Here's the hidden benefit: UTC doesn't have DST. When countries switch to/from summer time, your UTC devices don't change. You don't miss meetings because you forgot that Brazil stopped DST last week but Argentina didn't. UTC is constant.
Try it on your next trip. Give it two days. By day three, you'll be hooked.