Which day a work log is displayed in JIRA's own "Work Log Panel" is affected by time zone setting of;
JIRA server
Work log author's time zone
Time zone of the user viewing work log report
In other words, this panel may show the same work log as if it is entered on different days depending on above parameters. But WorkLogPRO always shows the same work log on the same day independent of above factors. It is shown exactly with the time zone of the user entering the work log. So if a Japanese employee had entered the work log on Monday morning it is also shown on Monday for European employees. Please refer to the following article for further explanation: Time Zones in JIRA by Deniz Oguz.