Marcus Olsson introduces the Hourly Heatmap plugin for Grafana, which adapts the popular but no longer maintained Carpet plot plugin to Grafana's new React-based platform introduced in version 7.0. Unlike Grafana's built-in heatmap panel, the Hourly Heatmap panel plots hours of the day along the Y-axis, making it particularly useful for monitoring systems with continuous daily activity by grouping data into hourly buckets and mapping them to color spectrums to indicate traffic levels. This plugin retains the original functionality of the Carpet plot while adding community-requested features such as time zone customization and the ability to display data only during specified working hours. It also supports new field options, allowing multiple queries within the same panel and customization of elements like color palettes. Olsson advises users to replace the Carpet plot with the Hourly Heatmap for Grafana 7.0 with minimal effort but recommends testing it alongside the original to identify any potential issues.