#CongressFoundationDay trended with 29.5K tweets.
Party leader Rahul Gandhi tweeted: "Today is the 135th #CongressFoundationDay. I will attend the flag hoisting ceremony at the AICC this morning & later a public rally in Guwahati, Assam.
"On our foundation day, let us acknowledge the selfless contribution of millions of Congress men & women through the ages."
The party's Twitter handle @INCIndia read: "Sacrifice for the nation stands above all else for the Congress party. From the time of our foundation, through the Indian independence movement & for all the days to come, India comes first."
Senior party leader and Rajasthan Chief Minister Ashok Gehlot tweeted: "At the programme organised by Rajasthan Pradesh Congress Committee on the occasion of #CongressFoundationDay at the PCC headquarters in #Jaipur after the flag march against the anti-people policies of the central government."
Mumbai Congress tweeted a picture of party leader and supporters rallying in the metropolis on the occasion. It read: "Congress workers along with leaders during the "Save Constitution-Save India" Shanti March at Mumbai."
Party leader Jaiveer Shergill wrote: "First Britishers attacked the foundation of our country then @INCIndia stood up to fight for freedom & today #BJP is attacking the foundation of diversity/secularism of our nation it is once again time for @INCIndia to stand up & fight dictatorial forces."
( With inputs from IANS )