It is a great virtue to value the priceless gift of time given by God. On the other hand, it is a great evil to devalue or "kill time". What a beautiful and blessed life it is to realise the value of time and use every minute of it creatively and live with a spirit of gratitude!
All the time that God gives us is good. Nothing that he gives is evil. To differentiate time as good or bad is to insult God, the giver of time. Labelling certain days and dates as evil, and setting aside or avoiding important initiatives and events on those days, is to denigrate the precious treasure of the invaluable gift of time that God, who is goodness itself, gives. Those who have this mentality may not find any time auspicious. All time--every month, every day, every night, every date, morning, noon and evening-- are all given by God. It is all good.
However, there is a season for everything. It is not possible for anyone to live only in happiness and success. Pain, failure and grief are part of the limitations of human life.
Time must be spent on spiritual
matters as on material. As soon as the Apostles heard the call of Jesus,
they left all and spent their time fully in following Jesus (cf Mt 4:18-22).
Even if we cannot spend all our time for evangelisation, we have a duty
to spend a part of our time for spiritual matters. Man does not live on
bread alone (cf Lk 4:4). The moments spent in prayer and the worship of
God become the most precious moments of life.