Converting the production date
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 year
| Month | 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).