Information on planned space launches can be found at:
• Gunter’s Space Page http://space.skyrocket.de/
• Zarya Space Information http://www.zarya.info/
• Spaceflight Now Launch Schedule https://spaceflightnow.com/launch-schedule/
• Spaceflight Fans http://www.spaceflightfans.cn/
• CNSpaceflight launch schedule in Google English

These threads on the NASA Space Flight forum can provide an indication of planned launch dates:
• Russian launch schedule http://forum.nasaspaceflight.com/index.php?topic=26990.9999
• Chinese launch schedule http://forum.nasaspaceflight.com/index.php?topic=5060.9999
• Indian launch schedule http://forum.nasaspaceflight.com/index.php?topic=1173.9999
• US launch schedule http://forum.nasaspaceflight.com/index.php?topic=8184.9999
• Japanese launch schedule http://forum.nasaspaceflight.com/index.php?topic=1181.999
• ESA launch schedule http://forum.nasaspaceflight.com/index.php?topic=6114.9999
• Iranian launch schedule https://forum.nasaspaceflight.com/index.php?topic=32345.9999

Upcoming ElaNa CubeSat launches http://www.nasa.gov/content/upcoming-elana-cubesat-launches

Satellite Missions Database https://directory.eoportal.org/web/eoportal/satellite-missions