Dear Colleague: We are soliciting nominations for the 2021 ACM PODS Alberto O. Mendelzon Test-of-Time Award. Eligible papers are those published in the proceedings of the 30th Symposium on Principles of Database Systems (PODS 2011): https://dblp.org/db/conf/pods/pods2011.html Please email your nomination by December 18, 2020, to thomas.schwentick@tu-dortmund.de Please include a brief justification in your nomination, such as the paper's impact in terms of research, methodology, or transfer to practice over the intervening decade. With best regards The ACM PODS Alberto O. Mendelzon Test-of-Time Award Committee Angela Bonifati Rasmus Pagh Thomas Schwentick (chair)