I've been looking and found none. There is also no evidence that there will be any noteworthy ones.
In the last few years there hasn't been anything for Christmas. It seems like Black Friday and Cyber Monday are all the registrars are doing anymore for this time of year.
Bigrock.com is offering a coupon today, not a big discount though.
If you register a domain name for two years, the first year will be free, use the coupon "DOMBRYR" (This expires today)
Here is a complete list of all Christmas offers by Bigrock: http://www.thirstycoupons.com/bigrock/christmas-coupon-codes-2015/
subreg.cz gives $1.49 .info registrations (with private whois) using the following coupon: FPHdQ9Sx
it's limited to 5/customer and you have to signup for an account first, then logged into your account order them one by one.