There doesn't have to be a specific time as that is difficult to coordinate internationally, without it being inconvenient for some. All the rites can be done solo, by reading aloud, perhaps with a candle, and or incense, or more elaborate if you choose! Relax beforehand, and anoint your brow with water before you start. Make sure you won't be interrupted by phones or people. Cats and dogs usually like to join in!
