It looks like we have one date confirmed. There will be a Flames playoff game on Saturday April 13th. They moved a Roughnecks game to accommodate it. Email received from the Roughnecks says:
Please be advised that due to the National Hockey League’s 2019 Stanley Cup Playoffs schedule, the Saturday, April 13 Calgary Roughnecks game versus the Georgia Swarm has been rescheduled to Friday, April 12 at the Scotiabank Saddledome.
Just thought I'd share for anybody else who would want to know.