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Page 397 the date were retained, it would be celebrated on the day corresponding to the 19th of July in the Gregorian calendar. The financial cost of implementing this calendar would be staggering, even in 1930 dollars. Virtually every business statistical table, interest table, actuarial calculation, and accounting procedure would have been altered. Many business leaders rejected the IFC solely on the basis of the cost of recalculating interest tables. All prior business records would have to be converted to IFC format in order to make the statistical comparisons which were a major justification for the IFC. The detailed date equivalence of the Gregorian and IFC systems is listed in Table 9.34. Table 9.34 Equivalence of Gregorian and IFC systems. Common Year (365 days) Leap Year (366 days) Gregorian Date IFC Date Gregorian Date IFC Date -> JAN 01 JAN 01 <- -> JAN 01 JAN 01 <-  . . .  . . .  . . .  . . . JAN 28 JAN 28 <- JAN 28 JAN 28 <- JAN 29 FEB 01 <- JAN 29 FEB 01 <-  . . .  . . .  . . .  . . . -> JAN 31 FEB 03 -> JAN 31 FEB 03 -> FEB 01 FEB 04 -> FEB 01 FEB 04  . . .  . . .  . . .  . . . FEB 25 FEB 28 <- FEB 25 FEB 28 <- FEB 26 MAR 01 <- FEB 26 MAR 01 <-  . . .  . . .  . . .  . . . -> FEB 28 MAR 03 FEB 28 MAR 03 -> MAR 01 MAR 04 -> FEB 29 MAR 04  . . .  . . . -> MAR 01 MAR 05 MAR 25 MAR 28 <-  . . .  . . . MAR 26 APR 01 <- MAR 24 MAR 28 <-  . . .  . . . MAR 25 APR 01 <- -> MAR 31 APR 06  . . .  . . . -> APR 01 APR 07 -> MAR 31 APR 07  . . .  . . . -> APR 01 APR 08 APR 22 APR 28 <-  . . . APR 23 MAY 01 <- APR 21 APR 28 <-  . . .  . . . APR 22 MAY 01 <- -> MAY 30 MAY 08  . . .  . . . -> JUN 01 MAY 09 -> MAY 30 MAY 09  . . .  . . . -> JUN 01 MAY 10 (table continued on next page)
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