How do you redeem your birthday free night??
There's nothing to redeem, it is just 1 elite night credit added to the current nights you have stayed for the year (and at least today, also added to your lifetime night total).
If you have a free night stay, your account activity will show an e-certificate for a free night at a Category 1-5 hotel. To use that award, simply search for a hotel and date using the "points" feature and then select Use Free Night Certificate to confirm your reservation. If you don't have a Free Night e-certificate in your account, this doesn't work and then as o0o0o0o0o0o...points! says you are referring to the free elite night credit which is not the same things as a free night e-certificate. Hope that is helpful.
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