From an HPR email...figured I'd pass it along
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The NASA event was previously moved to the weekend of March 19/20 so that the following two weekends could be used in the event of bad weather (you wouldn't know it to look outside today, but March IS our snowiest month, after all). With this coming weekend forecasted to be in the 60's I am confident that the "backup" dates will not be necessary.
So, the weekend of March 26/27 has been scheduled as Open Lapping, with bikes on Saturday and Cars on Sunday. These will be the final days this spring that will be run under the Winter pricing/hours/cancellation policies.