Prior to JIRA 7.0, the date picker would highlight the current date when first opened from an issue. As of JIRA 7.0, it highlights yesterday's date instead on Safari, Firefox and Internet Explorer.
Have the current date highlighted in the date picker, no matter which browser is used.
Yesterday's date is highlighted on Safari, Firefox and Internet Explorer.
On any field with JIRA's default date picker, click the 'calendar icon' while accessing JIRA through Safari, Firefox or Internet Explorer.
Manually select the date or use Chrome.