the task decorator has a task_run_name, which results in an error if

date

becomes a string Like this

@task(task_run_name='{name}-{date:%FT%T}')                         
def say_hello(name):                                               
    logger = prefect.context.get("logger")                         
    <http://logger.info|logger.info>("Hello, %s!", name)                                
    <http://logger.info|logger.info>('Flow run name: %s', prefect.context.flow_run_name)

Glad you got it! Another option would be to use a function to create the task_run_name and parse the date using pendulum first.