"确定时间或地点" can be translated into English as "confirm the time or location" or "determine the time or place".
"Confirm the time or location" emphasizes verifying or finalizing the already proposed or tentative time and place.
"Determine the time or place" focuses more on the act of deciding or fixing the time and place, which may imply starting from scratch or making a final decision.
Both expressions are commonly used and can be chosen based on the specific context.