We are deploying 37.004 to your sandbox instance on the 19th of January at 08:30 PM Pacific. (Deployment window will be between 08:30 PM & 11:30 PM Pacific)
Production Deployment is scheduled for the 20th February.
Note: This message only applies to group1 customers who are on 37.003.xx.xx. If you still have questions please reach out to the support team.