My (naive) answer would be to localize any DateTime to account for any changes in Date due to timezone, strip the time and compare the Dates. I'd reckon a Date

My (naive) answer would be to localize any DateTime to account for any changes in Date due to timezone, strip the time and compare the Dates. I'd reckon a Date means any time in that date and is of lower specificity than a DateTime, rather than midnight on that Date. Is there any obvious issue with this in a situation where you might be (inadvisably) comparing a Date to a DateTime?