In some situations, Rally Planned Start Date field is synchronized to Jira with a day subtracted from it.
For example, the date in Rally may be June 1, however after synchronizing to Jira, it is shown as May 31.
ConnectALL 3.4.0.1
Rally v2 adapter
DE116316 is filed and a fix for this will be released in a later version
As a workaround, support can provide a script that will add one day back to the Planned Start Date field.