Monterrey is 0 to 1 hours behind Dallas, depending on the time of year. If you are both awake 7 am to 11 pm, a January weekday gives you 16 hours awake at the same time, and 8 hours of those are outside a 9-to-5 for both of you (in July: 15 hours shared, 6 hours free). Here are the good ones.
Monterrey and Dallas are on the same time that week. On a weekday you are both awake for 16 hours, and 8 hours of those are outside work for both of you.
Worked out for the week of 11 January 2027 (11 Jan – 17 Jan), in Dallas time, with each zone’s own daylight-saving rules for those dates. Monterrey awake 7 am – 11 pm, working 9 am – 5 pm weekdays; Dallas awake 7 am – 11 pm, working 9 am – 5 pm weekdays.
A weekday, in Dallas timeboth awake
Dallasawake 7 am – 11 pm
Monterreyawake 7 am – 11 pm Dallas time
7a10a1p4p7p10p1a4a7a
Best on a weekday
6 – 8 pm Dallas
6 – 8 pm Monterrey · Dallas early evening, Monterrey early evening
Sat 6 – 9 pm Monterrey · Dallas early evening, Monterrey early evening
The week · Dallas time, 11 Jan – 17 Jan
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
Mon
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
Tue
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
Wed
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
Thu
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
Fri
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
Sat
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
Sun
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
Columns are Dallas hours; the small figure in each cell is the time in Monterrey. both freeboth awake, one at workMonterrey asleep
The Monterrey–Dallas gap through 2027
Dates
Difference
1 January – 13 March
Monterrey and Dallas are on the same time
14 March – 6 November
Monterrey is 1 hour behind Dallas
7 November – 31 December
Monterrey and Dallas are on the same time
The week grid and call windows were worked out for 11 Jan to 17 Jan 2027 with the IANA time-zone rules for America/Monterrey (Monterrey) and America/Chicago (Dallas). That week Dallas is on standard time and Monterrey keeps the same time all 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 Dallas
In Dallas
Monterrey, January
Monterrey, July
7 am
7 am
6 am
9 am
9 am
8 am
11 am
11 am
10 am
1 pm
1 pm
noon
3 pm
3 pm
2 pm
5 pm
5 pm
4 pm
7 pm
7 pm
6 pm
9 pm
9 pm
8 pm
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 Monterrey 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 Monterrey and Dallas?
Monterrey is 0 to 1 hours behind Dallas, depending on the time of year. In 2027 it is from 1 January to 13 March and from 7 November to 31 December; 1 hour from 14 March to 6 November.
What is the best time to call Monterrey from Dallas?
In January, the easiest two hours on a weekday are 6 – 8 pm Dallas, which is 6 – 8 pm Monterrey: Dallas early evening, Monterrey early evening. At the weekend, Sat 6 – 9 pm Dallas (Sat 6 – 9 pm Monterrey) 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 Monterrey and Dallas share?
If both of you are awake from 7 am to 11 pm, you share 16 hours on a January weekday, and 8 hours of them fall outside 9-to-5 working hours in both places; in July it is 15 hours shared and 6 hours free.
Does daylight saving time change the call times?
Yes. In 2027 Dallas changes its clocks on 14 March and 7 November and Monterrey does not change its clocks, so a call you keep at the same time in Dallas moves by an hour in Monterrey on those dates. Check the table on this page and agree the new time out loud after each change.