In 1699, Gurū Gobind Singh, called all Sikhs to assemble in the city of Anandpur Sāhib. On the day of Vaisākhī, the Tenth Nānak formally established the Khālsā Panth, the order of committed Sikhs, and granted this community the physical authority as Gurū. In remembrance of this historical event, these postcards impart the significance of Vaisākhī to anyone they are sent to.