Atlantic Daylight Time, of course. So 05:31 UTC.
Remember Curiosity and its Rube Goldberg-like planned landing? That happens tonight. Tomorrow morning, technically, for some of us. Phil Plait has details on how to participate in the fun:
If you want to watch the proceedings live, I have a few things you can do.
1) Fraser Cain, Pamela Gay, and I will be doing a Google+ Hangout on August 5th starting at 03:00 UTC on August 5/6 and running until 07:00 – note that for the US, this starts on the evening of the 5th at 23:00 Eastern time and runs through 03:00 in the morning. We plan on having special guests, a live feed from NASA, and more. The Hangout is being sponsored by Google itself, CosmoQuest, and the SETI Institute, which has a strong astrobiology mission and therefore is very interested in Mars. Our coverage will be complete, intense, awesome, and fun. Promise! There’s more info at Universe Today, and we have an events page set up on G+ to help you out. There’s also a Facebook events page, too! Use the #marshangout hashtag on Twitter to follow along, too.
2) You can always watch NASA TV. They’ve posted a schedule of events for media.
3) If you are in the Pasadena California area, then join the party! Literally: The Planetary Society is throwing a bash to celebrate
and watch the landing at the Paseo Colorado – Garfield Promenade on Saturday, August 4. Attending will be TPS blogger (and big pal o’ mine) Emily Lakdawalla as well as Bill Nye (yes, THE Bill Nye). You can get more info on Emily’s blog, and get tickets online. If I could, I’d go there too! But I’ll be at home and quite busy myself (see #1 above).
4) The Planetary Society is holding PlanetFest at the Pasadena Convention Center on August 4 and 5 – it’s again a celebration of planetary exploration. It looks like fun!
X-Box 360 users will also be able to live-stream the landing. My sleep schedule has been completely screwed by work for a very long time, so I’m planning on staying up myself. I’m trying to figure out if the PS3 browser can handle Ustream, but I’m not having a lot of luck with it myself. Anyone know of a good way to stream to PS3, given that’s my primary media centre?