not enough time for normal voting?

http://www1.voanews.com/english/news/usa/US-Senate-to-Hold-First-Key-Health-Care-Vote-70624747.html
US Senate to Hold First Key Health Care Vote

I wonder why an above board, legitimate, normal order of business vote must be held on a Saturday? Is this part of the new openness in government which included hiding from the public? Are they trying to ram something through and hoping that most of the senators are so anxious to get back to their hookers and blow that they will pass the bill without thinking about it?

I imagine if this is successful, that most new shameful orders of business will take place at very odd hours of the day and weekend.