Your skin repairs itself at night time as you sleep. The products you choose for your night time routine should take advantage of this regeneration process. If ageing is your primary concern then invest in night time masks, retinol, rich moisturisers packed with healing amino acids and hyaluronic acid. The evening time is best for purifying masks as you have more time. If you exfoliate your skin at night it’s going to be a little sensitive and so use that over night time to let skin heal. Do not use a day moisturiser which contains SPF at night time. Most SPF barriers use Zinc Oxide which has no benefit when used at night.