It depends on the maturity date of the FD.

1) Some banks fix the maturity date, disregard it is non-working day or not.
2) Some banks will adjust the maturity date according to the working day.

For 2), the interest is counted based on the day completed, so extra day interest is counted.

For 1) if the FD is matured on 1 Jan, the interest will be counted until 1 Jan, then the FD is deemed rolled over or auto-renew on 1 Jan. So by 4 Jan, you have 3 days interest, that whether bank is paying for it, this I cannot answer already.
As for my experience, I did ask for the extra days of interest before, due to sudden holiday before (the FD matured on a date was announced as sudden holiday), the teller asked the officer, the officer give nod on it to give the extra 2 days interest.

I have 2 FD that matured in RHB that fell on Sat. But as the manager just said cannot give the extra days of interest on Monday, I just let it go. This time as it was over 3 days of holiday and bigger amount, fueled/encouraged by one forummer (one lady I think  ), I asked the manager again.

So lets see on next Monday for me to get the 3 days interest. Around RM100 (depends on the rate they are giving me as it was a step-up rate, last one 5.38%) ! 

aiyo...gibe maths question. .. curious curious mesti work out . dapat jawapan 226k +-. 

The last time I din give up and they gave me the interest . But kenot remember if it was RHB or another bank, the rate they use is the board rate and not the promo rate of the FD in question . But like you said, enuf for nice dinner with loukong.

Ambank said new promo coming in January. CNY coming soon. So Affin will have their regular CNY promo.

I have a FD with Ambank which will matured in the month of Jan 2016, hope to retain the FD with Ambank.

CIMB Clicks eFD 4.3% 12 months. Minimum RM10k
https://www.cimbclicks.com.my/eFD.html

FYI, GIA 4.5% promo from Maybank no more already, was told by Maybank staff that this promo already reached its quota last week. Was planning to make placement this morning.

from the TnC:

For the avoidance of doubt, the FD Placement Amount for the purpose of this Campaign shall be of New Funds only. “New Funds” is defined as:
Cash, interbank GIRO, new funds received via telegraphic transfer from other banks, local cheque or banker’s cheque issued by other banks and deposited into the new or existing Mach FD accounts of the Eligible Customers maintained under their sole names;

call to Queensbaybranch , was told that only can use cheque 
apa la

Just placed this today. Okaylah. Lazy to go out.

Be sure to follow the link and do not click on other options while on clicks, if not you will not get the promotion rates.

Sad to hear u miss d boat
Anyway, another boat is on d way 

Just placed this today. Okaylah. Lazy to go out.

Be sure to follow the link and do not click on other options while on clicks, if not you will not get the promotion rates.

Called up RHB Bank. Have one 6 figure FD due on Friday 1/1. If withdraw on 4/1, will lose 3 days interest. After some talking, agreed to pay me the 3 days interest if I withdraw on the Monday. 

Last time the manager just said cannot pay the weekend interest. After I read one "nice" forummer's post, talked to RHB manager again. Initially still asking me to continue to their step-up 4.4% FD, but later still agreed to pay me the 3 days interest even if I withdraw. 

So CIMB eFD currently offers the best eFD rate amongst all the banks?

Hope the rate will continue to go up and up!!!

already banned RBH in my list, service lousy, branch manager empty vessel, ask question they tell you to call their hotline, damn slow processing. nothing good about them.

So CIMB eFD currently offers the best eFD rate amongst all the banks?

Most banks will never let you placed an existing funds at promo rates. You will have to move your money around if you want their promo rates.

So CIMB eFD currently offers the best eFD rate amongst all the banks?

already banned RBH in my list, service lousy, branch manager empty vessel, ask question they tell you to call their hotline, damn slow processing. nothing good about them.