I got my time calculation from
http://www.timeanddate.com/ which also gave the following celebrations for us to look forward to:
Useless dates related to the thread's birthday
Round number of seconds later
5,000,000 seconds later: Monday, March 12, 2007 at 2:32:20 PM
10,000,000 seconds later: Wednesday, May 9, 2007 at 11:25:40 AM
15,000,000 seconds later: Friday, July 6, 2007 at 8:19:00 AM
20,000,000 seconds later: Sunday, September 2, 2007 at 5:12:20 AM
25,000,000 seconds later: Tuesday, October 30, 2007 at 2:05:40 AM
30,000,000 seconds later: Wednesday, December 26, 2007 at 10:59:00 PM
Round number of minutes later
50,000 minutes later: Saturday, February 17, 2007 at 10:59:00 AM
100,000 minutes later: Saturday, March 24, 2007 at 4:19:00 AM
150,000 minutes later: Friday, April 27, 2007 at 9:39:00 PM
200,000 minutes later: Friday, June 1, 2007 at 2:59:00 PM
250,000 minutes later: Friday, July 6, 2007 at 8:19:00 AM
300,000 minutes later: Friday, August 10, 2007 at 1:39:00 AM
Round number of hours later
1500 hours later: Saturday, March 17, 2007 at 5:39:00 AM
2000 hours later: Saturday, April 7, 2007 at 1:39:00 AM
2500 hours later: Friday, April 27, 2007 at 9:39:00 PM
3000 hours later: Friday, May 18, 2007 at 5:39:00 PM
3500 hours later: Friday, June 8, 2007 at 1:39:00 PM
4000 hours later: Friday, June 29, 2007 at 9:39:00 AM
Round number of days later
50 days later: Sunday, March 4, 2007 at 5:39:00 PM
100 days later: Monday, April 23, 2007 at 5:39:00 PM
150 days later: Tuesday, June 12, 2007 at 5:39:00 PM
200 days later: Wednesday, August 1, 2007 at 5:39:00 PM
250 days later: Thursday, September 20, 2007 at 5:39:00 PM
300 days later: Friday, November 9, 2007 at 5:39:00 PM
Round number of weeks later
5 weeks later: Saturday, February 17, 2007 at 5:39:00 PM
10 weeks later: Saturday, March 24, 2007 at 5:39:00 PM
15 weeks later: Saturday, April 28, 2007 at 5:39:00 PM
20 weeks later: Saturday, June 2, 2007 at 5:39:00 PM
25 weeks later: Saturday, July 7, 2007 at 5:39:00 PM
30 weeks later: Saturday, August 11, 2007 at 5:39:00 PM
Lines that are highlighted are the "next" big events in each category
Note that these calculations do not account for time zone changes, daylight saving time and leap seconds (may be one hour off real difference)