AMRIT VELA: Amrit Vela means hour before the dawn of the day. In Sikhism, there is no concept of auspicious hour or moment . A Sikh, however, is supposed to get up before the dawn of the day and have shower before his daily worship and prayer. It does not mean that meditation at other times is less auspicious.
All the days, hours and moments are auspicious for remembering God. A Sikh should remember the Almighty throughout the day. See: Guru Granth Sahib, p. 3435, 386, 740 etc.
1. The Sikh Reference Book; Dr Harjinder Singh Dilgeer 1997