The nature of the problem is as follows. A search for a particular year correctly yields all dates on the database in that historical year (New Style, reckoned with year beginning 1 January). Thus a search on '1630', for instance will reveal all baptisms or marriages in that year. However their precise day/month dates will appear as if 30 days before the correct date. hence some dates display as if dated December 1629. This table gives the number of days of correction required. To correct, simply count the requisite number of days forward in time.

The table was made by interpolation after checking the website display against the printed sources used for input for several sequences of years and some odd years, using all entries for these years in the Marriage table. Results agree with individual entries in the Baptisms table already checked. The error is linked to the leap years, and the irregularity in the sequence at 1700 is due to the fact that 1700 would not be a leap year by modern rules was treated as a leap year at the time (see Cheney, Handbook of Dates).

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