Date-based automations: Controlling the time of day at which a Slack message sends

[hbarnes91]

Hello! I created a base automation that sends a Slack message to task assignees the day before their task deadline arrives. When I tested this automation, it fired in the middle of the night (makes sense, since this automation is date-based). 

Does anyone know of a way to control the time of day that a Slack message fires through a base automation?

Thanks for the help!