src/sap.ui.core/src/sap/ui/core/Configuration.js
function(sFormatId) {
			sFormatId = sFormatId ? String(sFormatId).toUpperCase() : "";
			check(!sFormatId || M_ABAP_DATE_FORMAT_PATTERN.hasOwnProperty(sFormatId), "sFormatId must be one of ['1','2','3','4','5','6','7','8','9','A','B','C'] or empty");
			var mChanges = this.oConfiguration._collect();
			this.sLegacyDateFormat = mChanges.legacyDateFormat = sFormatId;
			this.setDatePattern("short", M_ABAP_DATE_FORMAT_PATTERN[sFormatId].pattern);
			this.setDatePattern("medium", M_ABAP_DATE_FORMAT_PATTERN[sFormatId].pattern);
			this.oConfiguration._endCollect();
			return this;
		}
function(sFormatId) {
			sFormatId = sFormatId ? String(sFormatId).toUpperCase() : "";
			check(!sFormatId || M_ABAP_DATE_FORMAT_PATTERN.hasOwnProperty(sFormatId), "sFormatId must be one of ['1','2','3','4','5','6','7','8','9','A','B','C'] or empty");
			var mChanges = this.oConfiguration._collect();
			this.sLegacyDateFormat = mChanges.legacyDateFormat = sFormatId;
			this.setDatePattern("short", M_ABAP_DATE_FORMAT_PATTERN[sFormatId].pattern);
			this.setDatePattern("medium", M_ABAP_DATE_FORMAT_PATTERN[sFormatId].pattern);
			this.oConfiguration._endCollect();
			return this;
		}
function ( sFormatId ) { sFormatId = sFormatId ? String ( sFormatId ) . toUpperCase ( ) : "" ; check ( ! sFormatId || M_ABAP_DATE_FORMAT_PATTERN . hasOwnProperty ( sFormatId ) , "sFormatId must be one of ['1','2','3','4','5','6','7','8','9','A','B','C'] or empty" ) ; var mChanges = this . oConfiguration . _collect ( ) ; this . sLegacyDateFormat = mChanges . legacyDateFormat = sFormatId ; this . setDatePattern ( "short" , M_ABAP_DATE_FORMAT_PATTERN [ sFormatId ] . pattern ) ; this . setDatePattern ( "medium" , M_ABAP_DATE_FORMAT_PATTERN [ sFormatId ] . pattern ) ; this . oConfiguration . _endCollect ( ) ; return this ; }
Allows to specify one of the legacy ABAP date formats.

This method modifies the date patterns for 'short' and 'medium' style with the corresponding ABAP
format. When called with a null or undefined format id, any previously applied format will be removed.

After changing the legacy date format, the framework tries to update localization
specific parts of the UI. See the documentation of {@link sap.ui.core.Configuration#setLanguage}
for details and restrictions.

@param {string} sFormatId id of the ABAP data format (one of '1','2','3','4','5','6','7','8','9','A','B','C')
@return {sap.ui.core.Configuration.FormatSettings} Returns <code>this</code> to allow method chaining
@public
Allows to specify one of the legacy ABAP date formats .