The first full Mercury Retrograde cycle of 2017 begins with the Pre-Shadow on March 27 at 4:48 am UTC*. Mercury Retrograde Station occurs at 11:14 pm UTC, on April 9, in Taurus (4o 51″) Mercury goes direct on May 3 at 4:22 pm UTC, in Aries (24o 16″) Mercury leaves the Post-Shadow on May 21 at 12:58 am UTC.
Please note that all times are approximate. The actual times are defined by the observer location and vary due to parallax.
* Coordinated Universal Time (UTC) replaced Greenwich Mean Time in 1961. They are often used interchangeably.