In putting together my employment credentials and thinking positively about how to present the Sabbath and Holy Days to employers, I came up with these thoughts:
Does a potential employer balk at giving you the Sabbath off? Explain that the same command that gives us the Sabbath also says, "Six days you shall labor and do all your work" (Exodus 20:9). So we as Christians strive to have a strong work ethic and to be well organized in our efforts to get everything done on time.
Not only are we used to our weekly deadlines, but our annual schedule is well planned too. Any employer who has to schedule employees' vacation days and holidays will be impressed if you show a copy of the Holy Day calendar giving him or her your plans five or more years in advance!
Plus you can mention that you can work other holidays like Christmas and Easter that most other employees don't want to work. This can make you a valuable asset to the company as well.