[Code of Federal Regulations] [Title 41, Volume 4] [Revised as of July 1, 2002] From the U.S. Government Printing Office via GPO Access [CITE: 41CFR301-11.19] [Page 41] TITLE 41--PUBLIC CONTRACTS AND PROPERTY MANAGEMENT CHAPTER 301--TEMPORARY DUTY (TDY) TRAVEL ALLOWANCES PART 301-11--PER DIEM EXPENSES--Table of Contents Subpart A--General Rules Sec. 301-11.19 How is my per diem calculated when I travel across the international dateline (IDL)? When you cross the IDL your actual elapsed travel time will be used to compute your per diem entitlement rather than calendar days.