Add time zones option - repost

Hello I have a custom auction website similar to eBay The website is at [login to view URL] Currently, when an ad/auction is posted the website shows the time that is on the server. I want it to show the time according to the user's location. So I want your to add an option "Select Timezone" in user profile so times will be shown according to selected timezone. This option is already present for admin. You have to make is for user as well. Another problem is the video is not playing on acution pages. For example: [login to view URL] When you select the video from the left side, it gives an error page. Lastly, the category images on homepage are not sharp as they are originally uploaded. Turn off the image optimization settings. Payment released only after all work done and tested. 50% milestone will be created initially. Low bids preferred.