Sentence examples for not sure when from inspiring English sources

The expression "not sure when" is grammatically correct and commonly used in both written and spoken English.
It is typically used to express uncertainty or confusion about the exact timing of an event or action. Example: "I'm not sure when I'll be able to finish this project." This implies that the speaker does not know the specific date or time when they will complete the project. Another example: "She's not sure when her flight will arrive." In this case, the speaker is indicating that the arrival time is uncertain or unknown.