The pictures depict how a father nurtures his children since their birth.
Through this, the search engine has honoured the love and sacrifices that a father makes for the betterment of their children. Every year the day is celebrated on the third Sunday of June.
The doodle shows the a cactus father combing the child's hair, playing with them, and feeding them.
Fathers Day is celebrated to acknowledge the sacrifices and love they shower on us. On this day, children express thanks to their fathers for all their unconditional love and affection.
Celebration of the festival helps children understand the important role their father play in their life. Father's Day helps in strengthening father-child relationship and consequently in the emotional development of a child.
While Father's Day is usually celebrated on the third Sunday of June, several countries such as Italy, Croatia, Spain and Portugal celebrate it on March 19.
Source : http://www.ndtv.com/india-news/google-doodle-celebrates-fathers-day-showing-beautiful-father-child-bond-1713664