Does it make sense to hold your ICO on an auspicious day or not?
In the Asian culture there is a belief that some days are more auspicious for different events.
An example of this would be the list of dates for weddings, moving houses, decorations, buying vehicles etc.: https://www.yourchineseastrology.com/calendar/auspicious-grand-opening-date.htm
This also implies that there are potentially better times to do an ICO based and this could be important if your ICO has many asian buyers.
If you feel that this is important then you can also look at the use of colours such as Gold (prosperity) and Red (good luck) which are considered to be related to luck and fortune in your marketing materials.
The other thing to look at would be numbers such as 888 which is considered to the the luckiest number and avoiding the use of 4 which is considered to be unlucky.
That all been said your ICO should not rely on luck and you need to build a good value proposition around your token and offering rather than relying on the luck of the gods to bring you prosperity.