EventBridge Cron Expression for Different Time Intervals

To achieve the schedule you've described, you'll need to create two separate rules in AWS EventBridge Scheduler, as a single cron expression cannot accommodate different time intervals for specific hours and the rest of the day.

Here are the cron expressions for the two rules you need:

1. For running every 10 minutes between 02:00 AM and 02:59 AM UK time: cron(0/10 2 * * ? *)

2. For running every 5 minutes for the rest of the day: cron(0/5 0-1,3-23 * * ? *)

When creating these rules, make sure to set the time zone to UK time (Europe/London) using the ScheduleExpressionTimezone parameter. This ensures that the schedules run according to UK time, including adjustments for daylight saving time.

The first expression (0/10 2 * * ? *) breaks down as follows:

• 0/10: Run every 10 minutes
• 2: Only during the 2 AM hour
• *: Every day of the month
• *: Every month
• ?: Any day of the week
• *: Every year

The second expression (0/5 0-1,3-23 * * ? *) breaks down as:

• 0/5: Run every 5 minutes
• 0-1,3-23: During hours 0-1 and 3-23 (all hours except 2 AM)
• *: Every day of the month
• *: Every month
• ?: Any day of the week
• *: Every year

By creating these two separate rules with their respective cron expressions, you'll achieve the desired schedule of running every 10 minutes during the 2 AM hour and every 5 minutes for the rest of the day in UK time.
Sources
Schedule types in EventBridge Scheduler - EventBridge Scheduler
CreateSchedule - EventBridge Scheduler