When is the best time to pray if my day is already full?

The holy fathers tell us what the best time to pray is. The fathers tell us even in the middle of the night, they say, is the best time to pray. They say the whole world is asleep and the heavens are open. That is the language that they use: the whole world is asleep and the heavens are open. This is why many times, as a pious practice, a lot of Christians will set their alarm and they'll wake up in the night in order even just to pray for 10 or 15 or 30 minutes, to say the Jesus prayer, something that's very easy on their mind and not taxing, so that they can have this sense of the presence of God. There's a beautiful story. I believe that it's Elder Ephraim of Vatopedi who spoke about this, although it may have been a different night father, now that I think about it. But he said the whole reason that he was attracted to the monastic life is because his grandmother came to live with them in Greece, and they had such a small house that he had to live in the attic with his grandmother. But then in the middle of the night his grandmother would wake up, she would light the candle, and she would begin to do prostrations and praying, and he saw this representation of true living, true humanness. I believe it's also Saint Iakovos, the modern-day saint, who said that his mother would pray similar to this, and that he saw her one time bathed in the uncreated light. And we know from the witness of Elder Ephraim of Arizona that he and his mother and one of her close friends would oftentimes get up or be in the kitchen in the middle of the night doing prostrations and praying, as a normal attitude. Now, we may not be able to do that for a variety of reasons, but it's actually one of the benefits of motherhood and of nursing, that a mother gets to spend a lot of time nursing her child, even in the middle of the night, which is not supposed to be a chore, but it's supposed to be a spiritual offering to God. And there's no differentiation in this way. There's no differentiation in God. Saint Paisios says the mother who gets up with her child in the middle of the night, when she does this with a good attitude, receives the same grace that the monks on Mount Athos receive when they're doing an all-night vigil in the church. And lest we be discouraged, I believe it was one of the modern elders who said something along the lines of, a hundred Jesus prayers on Mount Athos is equal to one Jesus prayer in the world. So if we think, oh, Lord have mercy, I can't do three thousand, ten thousand Jesus prayers like they do on Mount Athos, the mathematics are different in the eyes of God. Even if we just sit at night when it's dark and the children have gone to bed, even if we're unable to wake up or do all those things, but before we rest our head on our pillow we simply just turn out the lights, we sit down and begin to say the Jesus prayer, there is a lot of grace that comes from this. Saint Ephraim of Katounakia, the modern-day saint who was known as Papa Ephraim, the disciple of Saint Joseph the Hesychast, he used to encourage people: just 30 minutes, just 30 minutes in the evening of the Jesus prayer works wonders. It's not the Jesus prayer in and of itself, the fathers tell us, but it's the name of Jesus Christ which scrubs the inside of us. The name of Jesus Christ has so much power that the devil cannot be around when this name is being uttered.