it is a way of caring the plants in order to grow and live and done during early morning and afternoon​

The very best time to water plants is in the early morning, while it is still cool. This will allow the water to run down into the soil and reach the roots of the plant without too much excess water lost to evaporation. Watering in the early morning will also make the water available to the plants throughout the day, so that the plants will be able to deal better with the heat of the sun.

Read more at Gardening Know How: Best Time To Water Plants – When Should I Water My Vegetable Garden? https://www.gardeningknowhow.com/edible/vegetables/vgen/water-plants-vegetable-garden.htm