12am in Costa Rica is 4pm in Australian Eastern Standard Time.

Frequently asked

Quick answers about converting between Costa Rica and Australian Eastern Standard Time. Can't find what you need? Email [email protected].

What is the time difference between Costa Rica and Australian Eastern Standard Time?

Costa Rica is 16 hours behind Australian Eastern Standard Time right now. We always show the live, daylight-saving-correct difference, so this figure already accounts for whichever side is observing summer time today.

When it's 12am in Costa Rica, what time is it in Australian Eastern Standard Time?

12am in Costa Rica is 4pm in Australian Eastern Standard Time. It falls outside the 9-to-5 in Costa Rica but lands inside working hours in Australian Eastern Standard Time. Use the hour-by-hour table above to read any other time across.

What's the best time for a call between Costa Rica and Australian Eastern Standard Time?

There's no comfortable 9-to-5 overlap between Costa Rica and Australian Eastern Standard Time — they sit on opposite sides of the planet's working day. Plan for an early or late call on one side, or hand work off asynchronously.

Does this account for daylight saving time?

Yes. We track every clock change in both places, so the abbreviations you see — CST and AEST — are the ones actually in effect right now, not a fixed all-year value. When either side changes its clocks, this page updates automatically.

Why is the date sometimes different on each side?

When two places are far enough apart, the same moment can fall on different calendar days. That is why some conversions are marked "previous day" or "next day" — it is the same instant in time, read off two clocks that crossed midnight at different points.