During the sunrise period, you can get a free Tezos Domain for your public baker or an existing public Tezos-related open-source project (one domain per project/baker). The domain expires one year from launch with the possibility to renew at any time during that period.
The main reason for a sunrise period is to allow existing projects and bakers to claim their domain without being exposed to higher pricing in auctions from domain squatters
The Sunrise registration period has ended on March 31st 2021. Don't worry if you missed it - you will still be able to register a domain after we launch, with prices starting from 1 tez.