Time Zones: Enrichment Worksheet for 4th - 5th Grade | Lesson Planet - Free Printable

Let’s solve this step by step.

We are given a time zone chart for the United States:

- Eastern Time (ET)
- Central Time (CT) — 1 hour behind ET
- Mountain Time (MT) — 2 hours behind ET
- Pacific Time (PT) — 3 hours behind ET
- Alaska Time (AKT) — 4 hours behind ET
- Hawaii Time (HT) — 5 hours behind ET

Also, note: The clocks in the image show:
- Eastern: 12 noon → so we can use that as our reference.
But actually, the problem doesn’t depend on the clock images — it gives us specific times and asks what time it is in other zones.

We’ll use the rule:
→ When you go WEST (from East to West), you subtract hours.
→ When you go EAST (from West to East), you add hours.

The order from east to west is:
Eastern → Central → Mountain → Pacific → Alaska → Hawaii

So:
- Central = Eastern - 1
- Mountain = Eastern - 2
- Pacific = Eastern - 3
- Alaska = Eastern - 4
- Hawaii = Eastern - 5

Now let’s solve each part.

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a. It is 6:25 A.M. in San Diego. What time is it in...

San Diego is in Pacific Time.

So, Pacific Time = 6:25 A.M.

We need to find:

- Dallas? → Dallas is in Central Time
- Central is 2 hours ahead of Pacific (because Pacific is 3 behind Eastern, Central is 1 behind Eastern → difference = 2 hours)
- So: 6:25 A.M. + 2 hours = 8:25 A.M.

- Denver? → Denver is in Mountain Time
- Mountain is 1 hour ahead of Pacific
- So: 6:25 A.M. + 1 hour = 7:25 A.M.

- Atlanta? → Atlanta is in Eastern Time
- Eastern is 3 hours ahead of Pacific
- So: 6:25 A.M. + 3 hours = 9:25 A.M.

- Honolulu? → Honolulu is in Hawaii Time
- Hawaii is 2 hours behind Pacific (Pacific is 3 behind Eastern, Hawaii is 5 behind Eastern → difference = 2 hours)
- So: 6:25 A.M. - 2 hours = 4:25 A.M.

Wait — let me double-check that last one.

If Pacific is 3 behind Eastern, and Hawaii is 5 behind Eastern, then Hawaii is 2 hours behind Pacific. Yes.

So 6:25 minus 2 hours = 4:25 A.M. Correct.

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b. It is 9:10 P.M. in Atlanta. What time is it in...

Atlanta is in Eastern Time → 9:10 P.M.

Find:

- Juneau? → Juneau is in Alaska Time
- Alaska is 4 hours behind Eastern
- So: 9:10 P.M. - 4 hours = 5:10 P.M.

- Honolulu? → Hawaii is 5 hours behind Eastern
- So: 9:10 P.M. - 5 hours = 4:10 P.M.

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c. It is 4:05 A.M. in Honolulu. What time is it in...

Honolulu is in Hawaii Time → 4:05 A.M.

Find:

- Denver? → Denver is in Mountain Time
- Mountain is 3 hours ahead of Hawaii (Hawaii is 5 behind Eastern, Mountain is 2 behind Eastern → difference = 3 hours)
- So: 4:05 A.M. + 3 hours = 7:05 A.M.

- Atlanta? → Atlanta is in Eastern Time
- Eastern is 5 hours ahead of Hawaii
- So: 4:05 A.M. + 5 hours = 9:05 A.M.

- Dallas? → Dallas is in Central Time
- Central is 4 hours ahead of Hawaii (Hawaii 5 behind, Central 1 behind → difference = 4 hours)
- So: 4:05 A.M. + 4 hours = 8:05 A.M.

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d. It is 11:00 A.M. in Juneau. What time is it in...

Juneau is in Alaska Time → 11:00 A.M.

Find:

- Denver? → Denver is in Mountain Time
- Mountain is 1 hour ahead of Alaska (Alaska is 4 behind Eastern, Mountain is 2 behind Eastern → difference = 2 hours? Wait, let's think again.)

Actually, better to use fixed offsets from Eastern:

- Alaska = Eastern - 4
- Mountain = Eastern - 2 → so Mountain is 2 hours ahead of Alaska

Yes: 11:00 A.M. + 2 hours = 1:00 P.M.

- Dallas? → Dallas is Central Time = Eastern - 1
- Alaska is Eastern - 4 → so Central is 3 hours ahead of Alaska
- 11:00 A.M. + 3 hours = 2:00 P.M.

- Honolulu? → Hawaii = Eastern - 5
- Alaska = Eastern - 4 → so Hawaii is 1 hour behind Alaska
- 11:00 A.M. - 1 hour = 10:00 A.M.

Let me verify all with a table to be sure.

Create a quick reference:

Time Zone | Offset from Eastern
----------|------------------
Eastern | 0
Central | -1
Mountain | -2
Pacific | -3
Alaska | -4
Hawaii | -5

So if we know any city’s time, we can convert to Eastern first, then to others.

Let’s re-solve using this method to avoid mistakes.

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Part a: San Diego (Pacific) = 6:25 A.M.

Pacific = Eastern - 3 → so Eastern = 6:25 + 3 = 9:25 A.M.

Now:

- Dallas (Central) = Eastern - 1 = 9:25 - 1 = 8:25 A.M.
- Denver (Mountain) = Eastern - 2 = 9:25 - 2 = 7:25 A.M.
- Atlanta (Eastern) = 9:25 A.M.
- Honolulu (Hawaii) = Eastern - 5 = 9:25 - 5 = 4:25 A.M.

Same as before. Good.

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Part b: Atlanta (Eastern) = 9:10 P.M.

So:

- Juneau (Alaska) = Eastern - 4 = 9:10 - 4 = 5:10 P.M.
- Honolulu (Hawaii) = Eastern - 5 = 9:10 - 5 = 4:10 P.M.

Good.

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Part c: Honolulu (Hawaii) = 4:05 A.M.

Hawaii = Eastern - 5 → Eastern = 4:05 + 5 = 9:05 A.M.

Then:

- Denver (Mountain) = Eastern - 2 = 9:05 - 2 = 7:05 A.M.
- Atlanta (Eastern) = 9:05 A.M.
- Dallas (Central) = Eastern - 1 = 9:05 - 1 = 8:05 A.M.

Perfect.

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Part d: Juneau (Alaska) = 11:00 A.M.

Alaska = Eastern - 4 → Eastern = 11:00 + 4 = 3:00 P.M.

Then:

- Denver (Mountain) = Eastern - 2 = 3:00 - 2 = 1:00 P.M.
- Dallas (Central) = Eastern - 1 = 3:00 - 1 = 2:00 P.M.
- Honolulu (Hawaii) = Eastern - 5 = 3:00 - 5 = 10:00 A.M. (since 3 PM minus 5 hours goes back to 10 AM)

Yes, correct.

All answers verified.

Final Answer:

a.
Dallas? 8:25 A.M.
Denver? 7:25 A.M.
Atlanta? 9:25 A.M.
Honolulu? 4:25 A.M.

b.
Juneau? 5:10 P.M.
Honolulu? 4:10 P.M.

c.
Denver? 7:05 A.M.
Atlanta? 9:05 A.M.
Dallas? 8:05 A.M.

d.
Denver? 1:00 P.M.
Dallas? 2:00 P.M.
Honolulu? 10:00 A.M.