Every year 18 June is celebrated as International Picnic Day in various countries of the world. This day is a day for friends and families to spend good time together and celebrate happiness. But before going on a picnic, you should know these things!br br हर साल दुनिया के विभिन्न देशों में 18 जून के दिन को अंतरराष्ट्रीय पिकनिक दिवस (International Picnic Day) के रूप में मनाया जाता है.