EST to CAT Time Converter
CAT is 6 hours ahead of EST. The US East Coast is currently on EDT (UTC-4:00), and CAT is UTC+2:00.
Best Time to Call Between EST and CAT
Both zones are inside normal business hours between 9:00 AM and 11:00 AM EST — that's 3:00 PM to 5:00 PM CAT. That's a 2-hour window.
both at work EST only CAT only neither — hours along the strip are EST.
Common Times Converted
EST on the left, CAT on the right.
EST to CAT: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| EST | CAT | Working hours |
|---|---|---|
| 12:00 AM | 6:00 AM | — |
| 1:00 AM | 7:00 AM | — |
| 2:00 AM | 8:00 AM | — |
| 3:00 AM | 9:00 AM | CAT only |
| 4:00 AM | 10:00 AM | CAT only |
| 5:00 AM | 11:00 AM | CAT only |
| 6:00 AM | 12:00 PM | CAT only |
| 7:00 AM | 1:00 PM | CAT only |
| 8:00 AM | 2:00 PM | CAT only |
| 9:00 AM | 3:00 PM | Both zones |
| 10:00 AM | 4:00 PM | Both zones |
| 11:00 AM | 5:00 PM | EST only |
| 12:00 PM | 6:00 PM | EST only |
| 1:00 PM | 7:00 PM | EST only |
| 2:00 PM | 8:00 PM | EST only |
| 3:00 PM | 9:00 PM | EST only |
| 4:00 PM | 10:00 PM | EST only |
| 5:00 PM | 11:00 PM | — |
| 6:00 PM | 12:00 AM next day | — |
| 7:00 PM | 1:00 AM next day | — |
| 8:00 PM | 2:00 AM next day | — |
| 9:00 PM | 3:00 AM next day | — |
| 10:00 PM | 4:00 AM next day | — |
| 11:00 PM | 5:00 AM next day | — |
What EST and CAT Actually Are
EST — Eastern Standard Time
New York, Toronto, Washington DC, Atlanta, Miami, Boston. Standing at UTC-5:00 as written, and the region does change its clocks, so its live offset moves by an hour twice a year. The next change is on Sunday, November 1, 2026, to EST. Australia also uses EST for its own Eastern Standard Time (UTC+10), now more often written AEST.
Eastern Standard Time is only actually in force from early November to mid-March. For the other eight months the same region is on EDT, which is why so many EST conversions are quietly wrong.
CAT — Central Africa Time
Harare, Lusaka, Maputo, Khartoum. Standing at UTC+2:00 as written, and the region does not change its clocks, so that offset holds all year.
Central Africa Time has never used daylight saving. Near the equator the length of the day changes so little that there would be nothing to shift.
What This Means in Practice
This gap is not fixed
EST changes its clocks and CAT does not, so the difference between them moves by an hour twice a year. A recurring meeting set now will drift for one side from Sunday, November 1, 2026 unless someone resets it.
Major Cities in Each Zone
Cities on EST
Cities on CAT
Frequently Asked Questions
What is the time difference between EST and CAT?
CAT is 6 hours ahead of EST. That is the live figure. Taken strictly as written, the gap between EST and CAT is 7 hours — the two differ because at least one of these regions is currently on daylight saving.
What is 9:00 AM EST in CAT?
9:00 AM EST is 3:00 PM CAT.
What are the best hours to schedule a call between EST and CAT?
Between 9:00 AM and 11:00 AM EST, which is 3:00 PM to 5:00 PM CAT. Both sides are inside normal business hours through that window.
Does the difference between EST and CAT change during the year?
Yes. EST observes daylight saving and CAT does not, so the gap shifts by an hour at least twice a year. The next clock change is on Sunday, November 1, 2026.
Does EST always mean Eastern Standard Time?
Australia also uses EST for its own Eastern Standard Time (UTC+10), now more often written AEST.