First select from below the view range you want, and then click on the item of that day to see the explanation, guidance, and tips for what you should do that day for the game's daily Guild Activity.  The guidance and/or tips will save you time and increase the rewards for the whole guild.  Further down on this page is a glossary of the acronyms used on the calendar.

Glossary

CB = Cantina Battles.
DC = Daily Challenges.
DSB = Dark Side Battles.
GWN = Galactic War Nodes.
HMB = Hard Mode Battles.
LSB = Light Side Battles.
SA = Squad Arena.
SE = Spend Energy.