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The only problem I've had is with reading a clock, but I developed methods of working around that, as a child. Even so, I still have trouble with it, at times, especially if I'm dealing with uneven increments that fall between whole numbers, like what time it will be 45 minutes after it's 4:17, for example. I have to visualize an analog clock face and then work it out graphically in my mind. Either that, or I count on my fingers (if there's no one else around). I've been known to count with my toes when there are people nearby. Shoes provide cover in more ways than one.
As for other time effects, I've never had that problem. I'm a high-functioning dyscalculic. I have an uncanny sense of the passage of time, for one thing; superior to most people's, in fact. Thus, I'm usually able to accurately estimate how long it will take to do things, etc, which comes in handy in my work (architectural drafting). Yep, that's right. I get by with a calculator, architect's scale and the measurement functions in Autocad, plus the calculator in Windows, if I need it. Just don't ask me to solve a math problem without my calculator.