Guam is 20 hours ahead of Honolulu all year. If you are both awake 7 am to 11 pm, a January weekday gives you 12 hours awake at the same time, and 2 hours of those are outside a 9-to-5 for both of you. Here are the good ones.
Guam is 20 hours ahead of Honolulu that week. On a weekday you are both awake for 12 hours, and 2 hours of those are outside work for both of you.
Worked out for the week of 11 January 2027 (11 Jan – 17 Jan), in Honolulu time, with each zone’s own daylight-saving rules for those dates. Guam awake 7 am – 11 pm, working 9 am – 5 pm weekdays; Honolulu awake 7 am – 11 pm, working 9 am – 5 pm weekdays.
A weekday, in Honolulu timeboth awake
Honoluluawake 7 am – 11 pm
Guamawake 11 – 3 am Honolulu time
7a10a1p4p7p10p1a4a7a
Best on a weekday
9 – 11 pm Honolulu
5 – 7 pm Guam · Honolulu evening, Guam early evening (their next day)
Another weekday option
5 – 7 pm Honolulu
1 – 3 pm Guam · Honolulu early evening, Guam lunchtime (their next day) · during Guam’s work hours
The long weekend call
Sat 6 – 9 pm Honolulu
Sun 2 – 5 pm Guam · Honolulu early evening, Guam afternoon
The week · Honolulu time, 11 Jan – 17 Jan
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
Mon
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
Tue
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
Wed
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
Thu
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
Fri
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
Sat
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
Sun
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
Columns are Honolulu hours; the small figure in each cell is the time in Guam. both freeboth awake, one at workGuam asleep
The Guam–Honolulu gap through 2027
Dates
Difference
1 January – 31 December
Guam is 20 hours ahead of Honolulu
The week grid and call windows were worked out for 11 Jan to 17 Jan 2027 with the IANA time-zone rules for Pacific/Guam (Guam) and Pacific/Honolulu (Honolulu). That week neither place changes its clocks at any time of year. The table uses the same rules for every day of 2027. The finder above recalculates for the current week in your browser.
When it is … in Honolulu
In Honolulu
In Guam
7 am
3 am (next day)
9 am
5 am (next day)
11 am
7 am (next day)
1 pm
9 am (next day)
3 pm
11 am (next day)
5 pm
1 pm (next day)
7 pm
3 pm (next day)
9 pm
5 pm (next day)
Wednesday times. Send times as “your 8 pm” or “my 8 pm” so nobody has to guess whose clock you mean.
If one of you is deployed or stationed in Guam
Duty days rarely follow nine to five. Set the work hours on the Guam side to “No fixed work hours” and read the grid as a map of who is likely awake, not a promise of who is free. Calls may depend on access and schedules you cannot see from home, so keep the windows above as a starting point rather than a plan.
Follow your unit’s guidance on what you share about times, places and movements. The deployment countdown has a private mode that hides every date, and the deployment countdown guide covers OPSEC habits for families.
Stop doing the math every day
The Long Goodbye keeps your person’s local time and time of day on your home-screen widget and lock screen, so you can see whether it is morning coffee or midnight in Guam before you call. A “thinking of you” tap lights up their widget, and a countdown keeps the next visit in view.
What is the time difference between Guam and Honolulu?
Guam is 20 hours ahead of Honolulu all through 2027, because neither place uses daylight saving time.
What is the best time to call Guam from Honolulu?
In January, the easiest two hours on a weekday are 9 – 11 pm Honolulu, which is 5 – 7 pm Guam: Honolulu evening, Guam early evening, the next day there. At the weekend, Sat 6 – 9 pm Honolulu (Sun 2 – 5 pm Guam) gives you a longer call. Change the awake and work hours in the finder on this page to fit your own days.
How many waking hours do Guam and Honolulu share?
If both of you are awake from 7 am to 11 pm, you share 12 hours on a January weekday, and 2 hours of them fall outside 9-to-5 working hours in both places.
Does daylight saving time change the call times?
No. Honolulu does not change its clocks, so the gap stays at 20 hours all through 2027.