How To Write A Letter To Use Holiday Hours . Dear customer, our office will be closed from [date] until [date] and close again on december 31 and january 1 to welcome the new year. Create a professional volunteer cover letter header. 37+ Christmas Letter Templates Free PSD, EPS, PDF Format Download from www.template.net That way everyone can really get updated on your life. Now i am describing to you about my holiday tour. Set the tone right from the beginning of your letter so your readers are in the frame of mind for the rest of it.