"On Monday, September 11, 2006, The NASDAQ Stock Market® will observe a moment of silence from 10:29 to 10:30 a.m., ET, in remembrance of those who lost their lives on September 11, 2001." -
http://www.nasdaqtrader.com/Trader/N...ta2006-125.stm
"On the 16-acre New York City expanse where the World Trade Center once stood, four moments of silence were planned for 8:46, 9:03, 9:59 and 10:29 a.m., the times when jetliners struck each of the twin towers, and when each tower fell.
...
There were also moments of silence set for 8:46 a.m. in the American and United terminals of Logan International Airport in Boston. American Airlines Flight 11 and United Airlines Flight 175 took off from Logan before slamming into the towers." -
http://news.yahoo.com/s/ap/20060911/...kxBHNlYwN0bQ--
Seems like you can have your moment of silence whenever you want.