| Mission | Date/Time | Event |
| stereoa | 2006.10.26.01.53.00 | Launch |
| stereoa | 2010.01.06.12.00.00 | HGA calibration |
| stereoa | 2010.04.19.12.00.00 | Begin 7 hour daily DSN tracks |
| stereoa | 2010.04.26.12.00.00 | Switch downlink rate to 240 kbps |
| stereoa | 2010.07.14.12.00.00 | HGA calibration |
| stereoa | 2010.09.07.12.00.00 | Begin 8 hour daily DSN tracks |
| stereoa | 2010.09.13.12.00.00 | Switch downlink rate to 160 kbps |
| stereoa | 2011.01.12.12.00.00 | HGA calibration |
| stereoa | 2011.02.06.12.00.00 | Stereo spacecrafts at 180 degree separation |
| stereoa | 2011.04.11.12.00.00 | Switch downlink rate to 120 kbps |
| stereoa | 2011.07.13.12.00.00 | HGA calibration |
| stereoa | 2011.09.26.12.00.00 | Switch downlink rate to 96 kbps |
| stereoa | 2012.01.11.12.00.00 | HGA calibration |
| stereoa | 2012.07.11.12.00.00 | HGA calibration |
| stereoa | 2012.08.15.12.00.00 | Switch downlink rate to 30 kbps |
| stereoa | 2012.08.15.12.00.00 | Stereo spacecrafts at 180 degree separation |
| stereoa | 2013.12.12.12.00.00 | Possible Mercury transit (TBC) |
| stereoa | 2015.02.17.12.00.00 | Start Sun occultation |
| stereoa | 2015.08.02.12.00.00 | End Sun occultation |