According to Osho, Sambodhi Day calls you to be joyous from within: become truly 'selfish' by knowing your own Self through playful, celebrative meditation. Only a joyful being can share joy; what you are radiates. Don’t force service or grim religiosity—center in awareness, let bliss flower, and benefit to others happens effortlessly.
First fill yourself with joy by meditating playfully; then your happiness will naturally spread to others without trying.