Is was not too difficult to display an analog clock on your blog. Please browse this site http://www.worldtimeserver.com/index.aspx, and choose an option : Clocks for your Web Sites. You may get for free the analog clock source code.
The next step is to change or customized clock parameter as you like; for example : clock mode, timezone, color; etc. Click your choice of clock mode for the first the follow by coloring; size and timezone.
After all, now you can copy the source code which will put on your blog widget (sidebar). Then please you do this following steps :
1. Log in to yout blog.
2. Click Lay out Tab; then Page Element Tab.
4. Add Gadget; Choose HTML/Java Script Widget.
5. Put you source code and Save.
You may choose HTML Source Code for Sidebar and Embed Source Code for diplaying analog clock in Post Content.