View|Today Pane|Show today pane or F11.

Hi Zenos, thank you for your response, but it does not work, I have looked in all the View and nothing there, and I tried the F11 but my laptop is Windows 10 and when I hit F11 it's to turn Off the speaker! I've been looking everywhere here and I cannot find nothing concerning my case!

two points.

I am on windows 10 and if I press F11 then the today pane appears. But Thunderbird has to have the focus.

Do you have the words today pane on the bottom right of your screen and a ^

Hello Mat, again I hit just the F11 and the speaker shut's off. I even hit the Ctrl, Alt, and the Microsoft icon with the F11 and nothing happens but when I only hit F11 the speaker goes Off. No I do not have anything on the bottom pane it's just shows how many email I have and the Total! There's nothing about a calendar also, I've been working at this for more than 4 hours now, just cannot find my calendar!

On the toolbar then  Select the Extensions on the right. Calendar functions are supplied by the add-on Lightning. So what does it tell you about the Lightning extension?

Matt, there was no Extensions on the right but I clicked the left side. I'll copy/paste what it written

Organize your schedule and life's important events in a calendar that's fully integrated with your Thunderbird email. Manage multiple calendars, create your daily to do list, invite friends to events, and subscribe to public calendars.Make Thunderbird or Seamonkey even more powerful with the fully integrated Lightning Calendar. Lightning allows you to organize your schedule, access remote calendars and much more. Try it today!

Read the latest news and get information about known issues first by subscribing to our blog or following @mozcalendar on twitter.

Lighting 4.0.5.2 for Thunderbird 38 is available here

Lightning also supports older versions of Thunderbird like 24 or 31, please see the complete version history for details.

Hi Matt, I just re-installed it and it works now! Thanks for your help, I really appreciated it!

Bibb said

Hi Matt, I just re-installed it and it works now! Thanks for your help, I really appreciated it!

If I live long enough I might learn my left from my right. I am one of those people that regularly hears "other left" or "other right". All that to say; Sorry about screwing it up.

Now back to the beginning. Good to see you got it working. If you have trouble again follow the non intuitive process of uninstalling Lightning and restarting Thunderbird.

Apparently since we started shipping Lightning with Thunderbird, the "shipped" version does not always get installed. Removing what you have can trigger the install. (it comes out of hiding). If that does not work try the install from add-ons.

I only mention this process as getting a "current" version of lightning into add-on.mozilla.org has not been a priority and sometime the latest version is simply not there because it is being shipped with the product. Call it an additional workaround.