Converting the production date
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Precondition
A production date and no expiration date is printed on the gas pressure springs for hood.
If an expiration date is printed: Continue with step 3.
- The production date (2) has the format (days/year).
- The production date must be converted to the (month/year) format.
- For the conversion, it is necessary to first determine whether the printed year is a leap year.
Leap year ... 2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 ... - 2016 is a leap year (example from the illustration).
- In the second step, the Imprinted day number (2) is converted to the month using one of the following tables.REGULAR YEAR
Month Days Day number January 31 1 ≤ n ≤ 31 February 28 32 ≤ n ≤ 59 March 31 60 ≤ n ≤ 90 April 30 91 ≤ n ≤ 120 May 31 121 ≤ n ≤ 151 June 30 152 ≤ n ≤ 181 July 31 182 ≤ n ≤ 212 August 31 213 ≤ n ≤ 243 September 30 244 ≤ n ≤ 273 October 31 274 ≤ n ≤ 304 November 30 305 ≤ n ≤ 334 December 31 335 ≤ n ≤ 365 LEAP YEARMonth Days Day number January 31 1 ≤ n ≤ 31 February 29 32 ≤ n ≤ 60 March 31 61 ≤ n ≤ 91 April 30 92 ≤ n ≤ 121 May 31 122 ≤ n ≤ 152 June 30 153 ≤ n ≤ 182 July 31 183 ≤ n ≤ 213 August 31 214 ≤ n ≤ 244 September 30 245 ≤ n ≤ 274 October 31 275 ≤ n ≤ 305 November 30 306 ≤ n ≤ 335 December 31 336 ≤ n ≤ 365 - 253 corresponds to the month of September (example from the illustration).