Showing the number of days from any date in one month to the same date in any other month.

 FROM TO Jan. Feb. Mar. Apr. May June July Aug. Sep. Oct. Nov. Dec. January.................. 363 81 59 90 120 151 181 212 243 273 304 334 February 334 365 28 59 89 120 150 181 212 242 273 303 March................... 316 337 365 31 61 92 122 153 184 214 245 275 April..................... 275 306 334 365 30 61 91 122 153 183 214 244 May....................... 245 276 304 335 365 31 61 92 123 153 184 214 June...................... 214 245 273 304 334 365 30 61 92 122 153 183 July....................... 184 215 243 274 304 335 365 81 62 92 123 153 August................... 153 184 212 243 273 304 334 365 31 61 92 122 September.............. 122 153 181 212 242 273 303 334 365 30 61 91 October 92 123 151 182 212 243 273 304 335 365 31 61 November.............. 61 92 120 151 181 212 242 273 304 334 365 30 December 31 62 90 121 151 182 212 243 274 304 335 365

Example - How many days from May 5th to October 5th? Look for May at the left hand and October at the top; in the angle is 153. In leap year add one day if February is included.