B and I got the keys to our humble 3-room BTO (Build To Order) flat in May 2013.
BTO basically means , you “reserve” your flat now and pay it later since the construction will takes about 3 years to complete each housing project. Flats are getting more and more expensive and thus this is sort of a cheaper option for Singaporean citizens comparing to buy a property in the market rather than from HDB. And also you will never know how much more the housing going to inflate in the next 3 years. Currently those who bought their properties 10 years ago , they are now worth more than double . Good money isn’t it? But if you cash it out , where are you going to stay? (unless you downgrade from 5-room to 3-room flats)
Anyway, we did not go to visit the place immediately cause we believe in picking an auspicious hour in doing major/significant event that affects our lives. haha (yes, the 1st time to enter the house is a significant event!)
通书 (Tong Shu) is one of the primary method to check whether that particular date is a good day to carry out certain things.
If you do not need or do not want to engage professionals to advise and you believes in what you read from the Internet, i would recommend Jiriba. It simply has all the information you need including the date “clashes” with which chinese zodiac and even list out the auspicious hour.
There were a few drawbacks that i had from the site.
1. It’s completely written in Chinese (I had a hard time reading it so I just simply leave it to B to check)
2. You need to decipher the time (to convert the chinese time to erm.. SGT) as it’s not written as direct as “9am – 10am”.
3. You need to know what “event” that you are checking for. For me, I do not know what’s the “event” call for “1st-time-opening-door” . Unfortunately it’s not as clear as “开门日”.. /shrugs
If you can understand the “chim” chinese, please check out the site cause it’s most probably good as a “Tong Shu Shifu” ! haha
And Of course! Just for people like me, there is always a simplified version! you might find it too simple and do not want to believe in it . However, there is no “good day” if you are choosing to move in from now till end of Dec 2013. 
Good Luck in checking!
Disclaimer : I’m NOT a fengshui shifu nor fortune teller. Believe the site at your own risk. Haha