| June 14 | 1924 | Birthday of Mother Petra |
| June 1 | 1969 | Foundation Day |
| June 29 | Feast day of Mother Petra | |
| September 29 | 1970 | Approval of the first Constitution |
| May 3 | 1971 | Blessing of the Mother House at Pattuvam |
| January 1 | 1972 | First profession of the first members |
| June 5 | 1976 | Mother Petra Born to Heaven |
| June 1-4 | 1983 | I General Chapter |
| September 21 | 1983 | Congregation raised to Diocesan Status |
| Oct 31 | 1987 | Mission started in Germany |
| June 29 –July 2 | 1989 | II General Chapter |
| April 27 | 1991 | Opening of the Novitiate at Bangalore |
| 1993 – 1994 | Silver Jubilee of the Congregation | |
| Dec 24 | 1994 | Mission started in Italy |
| May 30 - 31 | 1995 | III General Chapter |
| June 1 | 1999 | Official Declaration of the Congregation into three Regions |
| June 15 | 1999 | Erection of the Vimala Region |
| June 18 | 1999 | Erection of the Nirmala Region |
| June 23 | 1999 | Erection of Amala Region |
| Dece. 28–31 | 1999 | 1st Regional Assembly of Vimala Region |
| Jan.1–2 | 2000 | 1st Regional Assembly of Nirmala Region |
| Jan. 25–27 | 2000 | 1st Regional Assembly of Amala Region |
| February 21 | 2000 | Death of Sr. Holda, the then Superior General |
| Oct 23-28 | 2000 | IV General Chapter |
| June 1 | 2001 | Promulgation of the Revised Constitution & Directory |
| June 5 | 2001 | 25th Death Anniversary of Mother Petra |
| March 1 | 2001 | General Administration shifted to separate building |
| April 26 | 2001 | Erection of the Unit House (M.P, U.P & Jarkhand) |
| Jan 11 | 2003 | Blessing and Inauguration of the Prayer House at Poomala |
| February 2 | 2003 | Dinasevanasabha raised to the Pontifical Status |
| December 8 | 2004 | Blessing of the New Ashram Chapel |
| Sept. 27–Oct. 8 | 2006 | V General Chapter |
| 2007 | Dinasevanasabha has added to the Merician Family | |
| March 19 | 2007 | Revised Constitution & Directory Approved by Rome |
| April 29–May 5 | 2007 | Regional Assembly of Amal Jyothi Vice- Province |
| May 7–12 | 2007 | Regional Assembly of Vimala Province |
| May 12–18 | 2007 | Regional Assembly of Nirmala Province |
| May 18–25 | 2007 | Regional Assembly of Amala Province |
| June 1 | 2007 | Declaration & Erection of DSS into three provinces & One Vice Province |
| Aug 25 | 2007 | Award given to Mother Willigard |
| June 14 | 2009 | Declaration of Mother Petra Dinadasi as Servant of God by Rt. Rev. Dr. Varghese Chakkalakal, the then Bishop of the Diocese of Kannur. |
| May 6 | 2010 | Death of Mother Willigard, the Second Superior General |
| May 11–18 | 2010 | 1st Provincial Chapter of Vimala Province |
| May 19–27 | 2010 | 1st Provincial Chapter of Amala Province |
| May 5–6 & June 6–13 | 2010 | 1st Provincial Chapter of Nirmala Province |
| May 5–6 &July 12–17 | 2010 | 1st Provincial Chapter of Amal Jyothi Vice-Province |
| Sep 21 | 2010 | Blessing and Inauguration of the Newly constructed Generalate at Pattuvam |
| Nov 11 | 2011 | Blessing of the newly constructed Novitiate House at Bathery. |
| September 28 | 2012 | Exhumation,Identification and Replacement of the Mortal Remains of Mother Petra Dinadasi, the Servant of God in the new tomb prepared in the Ashram Chapel |
| Sept.30–Oct. 15 | 2012 | VI General Chapter |
| April 10–19 | 2013 | II Provincial Chapter of Vimala Province |
| April 13–20 | 2013 | II Provincial Chapter of Amal Jyothi Vice IProvince |
| May 8–17 | 2013 | II Provincial Chapter of Nirmala Province |
| May 8–18 | 2013 | II Provincial Chapter of Amala Province |
| January 6 | 2014 | Rev. Fr. Linus Maria Zucol S.J., Born to Heaven |
| September 3 | 2014 | Sr. Daniela DSS, the Superior General, visited His Holiness Pope Francis |
| February 13 - 22 | 2016 | III Provincial Chapter of Amal Jyothi Vice-Province |
| February 24 - 29 | 2016 | III Provincial Chapter of Vimala Province |
| March 10 -18 | 2016 | III Provincial Chapter of Nirmala Province |
| March 31- April 9 | 2016 | III Provincial Chapter of Amala Province |
| June 1 | 2016 | Closing ceremony of the Diocesan Inquiry of the Canonization of Mother Petra Dinadasi, the Servant of God |
| June 6 | 2016 | 40th Death Anniversary of Mother Petra, the Servant of God. |
| June 14 | 2017 | Inauguration & blessing of the Mother Petra renovated Museum ("Smruthinilayam") & DSS History Museum. |
| Sept 30 | 2017 | Gathering of the Children of Dinasevanasabha |
| June 1 | 2018 | Opening of the Golden Jubilee of Dinasevanasabha |
| July 23 | 2018 | Home Day Celebration |