About the Birthday Contact Property

Apple iOS supports no year-date data. Internally, iOS stores the year as 1604 for no year-date data. The earliest year-date data that Siebel supports is 1753. So when synchronizing with the iOS CardDAV client or Android CardDAV client, 1753 is used to indicate the no year-date data.

• When uploading data (upload synchronization), any year-date data less than or equal to 1753 is stored in Siebel as the year 1753.

  For example:

  April 1, 1754 on an iOS and Android CardDAV client uploads to Siebel as 04/01/1754.

  April 1, 1700 on an iOS and Android CardDAV client uploads to Siebel as 04/01/1753.

  April 1 on an iOS and Android CardDAV client uploads to Siebel as 04/01/1753

• When downloading data (download synchronization), the Siebel date year 1753 is converted to the year 1604, and the data shows up in the CardDAV client as follows:

  • In the iOS CardDAV client as no year-date data.

  • In the Android CardDAV client as date data with the year 1604.

    For example:

    04/01/1754 on Siebel downloads to the iOS and Android CardDAV client as April 1, 1754.

    04/01/1753 on Siebel downloads to the iOS CardDAV client as April 1.

    04/01/1753 on Siebel downloads to the Android CardDAV client as April 1, 1604.