That time is the first week of April when I cook for the hummingbird's ---their first nectar when they arrive here at my house.
No one much shows up QUITE this early but I need to be ready if they do. The males will arrive first and the females a few days later. The males happen to leave first in the end of September or the first day or so of October- and the females leave a few weeks later.
I always cook for my hummingbirds. One measured cup of white sugar, and 4 cups of water. No red food coloring needed and it may even be harmful. Believe me, I have proved this is so as my feeder that is filled with clear nectar is always caked with hummingbirds. Stir sugar and the water up in a pan, heat to boiling point. Allow to cool, and poor into a glass quart or large sized jar and cap tightly. Of course do this AFTER you have filled the feeder. :-)
This is the time of year I so look forward to. The arrival of the hummingbirds and my first personal sighting of one right here at my deck feeder. I love them.
IN warm weather, or more importantly in hot weather, don't allow the nectar to stay in the feeder longer than 4 days tops. It sours and may become filled with fungi as it is spoiling in the heat--- that will hurt your hummingbird babies. (I call 'em babies. I don't care if they are adults). This is my feeder and one of my female hummingbirds last year.