This infographic vizualises time of the day when air raid alerts went off more frequently. Data for Kyiv from 28.02.2022 to 12.03.2022 was used. 

24-hour dial colored in shades of red and orange. Closer to red means air raid alerts occured more frequently at specific time. 

We can see that most dangerous time was after the dawn, from 6 to 7 am.