Today we commemorate the Life-Giving Spring or Life-Giving Font of the Mother of God (Greek: Ζωοδόχος Πηγή; Russian: Живоносный Источник). The feast day is associated with a historic church just west of Constantinople in Valoukli, as well as an icon of the Theotokos. The feast day of the Life-Giving Spring is commemorated on Bright Friday of each year (the Friday following Pascha), being the only feast day which may be celebrated during Bright Week, while the commemoration of the Life-Giving Spring Icon of the Most Holy Theotokos is observed on April 4. Read more about the feast and the icon in the following article.
image source: http://tinyurl.com/zje7uy4