Tokyo is 19 hours ahead of Honolulu all year. If you are both awake 7 am to 11 pm, a January weekday gives you 11 hours awake at the same time, and 1 hour of those are outside a 9-to-5 for both of you. Here are the good ones.
Tokyo is 19 hours ahead of Honolulu that week. On a weekday you are both awake for 11 hours, and 1 hour 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. Tokyo 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
Tokyoawake noon – 4 am Honolulu time
7a10a1p4p7p10p1a4a7a
Best on a weekday
5 – 7 pm Honolulu
noon – 2 pm Tokyo · Honolulu early evening, Tokyo lunchtime (their next day) · during Tokyo’s lunch break
Another weekday option
noon – 2 pm Honolulu
7 – 9 am Tokyo · Honolulu lunchtime, Tokyo morning (their next day) · during Honolulu’s lunch break
The long weekend call
Sat 6 – 9 pm Honolulu
Sun 1 – 4 pm Tokyo · Honolulu early evening, Tokyo lunchtime
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
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
Tue
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
Wed
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
Thu
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
Fri
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
Sat
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
Sun
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
Columns are Honolulu hours; the small figure in each cell is the time in Tokyo. both freeboth awake, one at workTokyo asleep
The Tokyo–Honolulu gap through 2027
Dates
Difference
1 January – 31 December
Tokyo is 19 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 Asia/Tokyo (Tokyo) 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 Tokyo
7 am
2 am (next day)
9 am
4 am (next day)
11 am
6 am (next day)
1 pm
8 am (next day)
3 pm
10 am (next day)
5 pm
noon (next day)
7 pm
2 pm (next day)
9 pm
4 pm (next day)
Wednesday times. Send times as “your 8 pm” or “my 8 pm” so nobody has to guess whose clock you mean.
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 Tokyo 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 Tokyo and Honolulu?
Tokyo is 19 hours ahead of Honolulu all through 2027, because neither place uses daylight saving time.
What is the best time to call Tokyo from Honolulu?
In January, the easiest two hours on a weekday are 5 – 7 pm Honolulu, which is noon – 2 pm Tokyo: Honolulu early evening, Tokyo lunchtime, the next day there, during Tokyo’s lunch break. At the weekend, Sat 6 – 9 pm Honolulu (Sun 1 – 4 pm Tokyo) 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 Tokyo and Honolulu share?
If both of you are awake from 7 am to 11 pm, you share 11 hours on a January weekday, and 1 hour 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 19 hours all through 2027.