of 174 respondents and acceptance of males in the nursing profession by multiple regression analysis has indicated that only two of the variables, namely, respondents' educational level and sex, significantly predict the attitudes toward male nurses (Laroche and Livneh, 1983).
I have always used by end of business which normally means by 5pm. I think that it depends on who you are sending the email to. If it is a superior you might want to reconsider and define an exact time deadline. If it is to a subordinate giving a general time frame like end of today or end of the day would be fine. share|improve this answer.
In 1913 Tax Day, or the filing deadline, was fixed on March 1. However, it was moved to March 15 in 1918 and April 15 in 1955, where it has remained since then. If April 15 falls on a Saturday, Sunday or a civil holiday, such as Patriot's Day, the deadline is extended to the next working day.