| 1907 | Arrival of Fr John Unterberger from London |
| 1921 | Opening of Membakut Mission by Fr Arnold Verhoeven |
| 1961 | Death of Fr Henry van Heyden at Hal Belgium |
| 1970 | Formation of Young Christian Workers (YCW) movement in Sabah |
| 1972 | Maria Nobleza takes over from Patricia Maluda as editor of CS |
| Formation of CWL Tawau | |
| 1984 | Visit of Jim Campion, news editor of UCAN |
| 1999 | Death of Fr Georg Saraber mhm |
Sept 1
| 1895 | Death of Fr Bernard Kurz mhm |
| 1966 | Immigration policy that no PR be given to foreign missionaries in Sabah takes effect |
| 1969 | Formation of Membakut Parish Council |
| 1970 | Fr Peter Chung Hoan Ting appointed Coadjutor Vicar Apostolic |
| 1983 | Fr John Lee takes up appointment as Vicar General |
| 1989 | Launching of Diocesan Eucharistic Congress |
| 1997 | Priestly ordination of Deacon Simon Kontou by Bp Lee |
| 2017 | Priestly ordination of Deacon Leslie J Bingkasan SJ by Abp Wong, St Catherine Inanam |
| 2017 | Transfer of Fr Mitchelly Kiun from SHCKK to St Catherine Inanam and Fr Paul Lo from Inanam to SHCKK |
Sept 2
| 1978 | 7th PAX Assembly SHPH Sept 2-4 |
| 1983 | Death of Fr John Leo Quinn, 82, Freshfield England |
Sept 3
| 1984 | Death of Stanley E Augustine |
| 1993 | Seminar on Church social teachings by Br Anthony Rogers fsc CDC Sept 3-5 |
| 1996 | 1st professions of FSIC Novices Mary Wong, Regina Kuming, Catherine Francis, Florence Nemesius, Anita James, officiated by Msgr Jouil, Loreto Convent |
| 2017 | Start of 1st Sunday third collection for new Catholic Centre building project in the archdiocese |
Sept 4
| 1855 | Erection of Prefecture Apostolic of Labuan and Borneo by Pope Pius IX with Don Carlos Cuarteron as Prefect Apostolic |
| 1976 | OLPH novena devotion starts in Tawau |
| 1992 | Marriage enrichment experience conducted by Fr John Ha of Kuching in Sandakan Sept 4-6 |
| 1998 | PUKAT 4 Kaingaran Sept 4-7 |
| 1999 | Inaugural Keningau Diocesan youth camp Toboh Tambunan Sept 4-8 |
| 3rd East Malaysian Catholic Women Conference Sibu Sept 4-10 | |
| 2003 | Death of Tan Sri Datuk Panglima Benedict Stephens, 77, SMC Likas |
| 2003 | CMI hosts parish-level Migrant Sunday |
| 2017 | Death of Fr Fundes Motiung, 51 |
Sept 5
| 1973 | Death of Fr Thomas Delaney mhm |
| 1976 | Death of Rt Rev Anthony Galvin mhm |
| 1989 | Death of Dunstan Dumpangol of Keningau |
| 1993 | Children’s Bible Quiz Sandakan |
| Blessing of St Augustine Kinarut by Bp Lee | |
| 2000 | Jubilee of Youth Sept 5-9 SHC |
Sept 6
| 1906 | Death of Fr Cornelius de Vette mhm |
| 1987 | Silver jubilee of St Peter Claver Ranau |
| 1995 | Visit of Apostolic Delegate Abp Luigi Bressan Sept 6-16 |
| 1999 | Inaugural MYTC Charity Golf Tournament Sabah Golf & Country Club |
| 2003 | Study day on Global Migration by Br Anthony Rogers fsc CDC |
Sept 7
| 1980 | Formation of 1st neo-catechumenal community in Sabah under Fr Chi SHC |
| 1982 | Introduction of RCIA to SHC |
| 2002 | Liturgical seminar for Penampang Zone 1 (Babagon) Sept 7-8 |
| 2003 | Final professions of PKarm Srs Maxmilliane (Ivy) Soon & Mary Eugenia William at Kaingaran officiated by Bp Piong |
| 2015 | Diaconal ordination of Joshua Liew Chi Khiong by Abp Wong SHC |
Sept 8
| 1950 | Formation of “Our Lady Help of Christians” Praesidium St Michael Penampang by Fr Desmond McLindon mhm |
| 1988 | Priestly ordination of Deacon Martin Wong by Bp Lee in Tawau |
| 1995 | Golden jubilee of Br Charles O’Leary fsc |
| 2000 | Golden jubilee of Legion of Mary in Sabah |
Sept 9
| 1946 | FSIC novitiate house established on slope of Carmel Hill |
| 1990 | Fr Denis Allen of Hobart Australia celebrates Sunday Mass at FSP Convent |
| 1995 | Priestly ordination of Deacon Paul Mikin by Bp Piong KSFX Keningau |
| 1998 | 10th KK Diocesan youth festival Sandakan Sept 9-13 |
| 1999 | 4th KK Diocesan youth consultation BTRC |
| 2001 | FSIC bazaar in aid of Pace Bene building fund |
| 2003 | Centering prayer retreat facilitated by Br Peter Foo fsc Sept 9-10 |
| 2017 | Solemn profession of OFM Friars Aiden Peter Jr & Cruzender Alex officiated by Abp Wong, SHC |
Sept 10
| 1982 | BM/KD bible seminar for Limbahau parish councillors |
| 1983 | Sabah chief commissioner of scouts Sam Lourdes receives “datukship” from TYT Tun Mohd Adnan Robert |
| 1987 | Seminar for Sunday school teachers CDC |
| 2017 | Groundbreaking ceremony for Tadika Kasih Bonda Ranau by Abp Wong. Pastors : Fr Nicholas Stephen, Fr Francis Tsen. |
Sept 11
| 1992 | 20th PAX Assembly: Behold, I make all things new BTRC Sept 11-13 |
| 1999 | 4th Sabah CCR conference KDCA |
| 2010 | Death of Fr Tobias Chi Shu Chang |
| 2016 | FSIC holds fundraising bazaar SHPC |
Sept 12
| 1980 | Death of Fr John Clementi mhm, 63, in Lahad Datu |
| 1984 | Blessing of BTRC by Bp Fung |
| 1992 | Bishop Lee receives “datukship” from TYT Tun Haji Mohd Said Keruak |
| 1998 | 22 CWL members attend Women Federation of World Peace Conference Beach Hotel Tg Aru Sept 12-13 |
| 2003 | 2nd weekend experience organized by diocesan aspirants CDC Sept 12-14 |
| 200 choirs take part in Keningau Choral Festival KSFX Sept 12-14 | |
| Christian Life Programme (CLP) conducted by CFC Sept 12-14 sponsored by SH Filipino Community | |
| 2016 | Clergy Annual Retreat BTRC Sept 12-16 |
| CFC-HOLD 7th Echo Conference SHPC | |
| CMI Children’s Camp |
Sept 13
| 1991 | Blessing of 4-storey wing of BTRC by Bp Lee |
| 19th PAX Assembly: We are a Eucharistic People BTRC Sept 13-16 |
Sept 14
| 1977 | Clergy picnic on Pulau Sapi |
| 1990 | Frs T Makajil, B Anthonius & D Sham attend 2nd worldwide retreat for priests in Rome Sept 14-18 |
| 1992 | 11th PAX Youth Assembly Sept 14-17 BTRC |
| 1995 | 23rd PAX Assembly: Church & Evangelisation facilitated by Frs Manny Guazon & Gerry Tapiador of the Philippines in the presence of Abp Luigi Bressan Sept 14-17 |
| 2001 | 25th PAX Assembly: Launching of Diocesan Silver Jubilee (SJD) w/ historical exhbibition Sept 14-17 BTRC |
| PUKAT 5 KSFX Keningau Sept 14-16 | |
| 2002 | Opening of SJD exhibition at SHPC by Apostolic Delegate Abp Adriano Bernardini & Bp Lee |
Sept 15
| 1945 | Fr Arnold Verhoeven appointed Administrator of the Prefecture Apostolic of Northern Borneo |
| 1977 | 6th PAX Assembly Sept 15-16 SHPH |
| 1978 | Inaugural BM youth camp in Keningau Sept 15-17 |
| 1984 | 1st profession of Canossian Novice Flora Jingulam of Penampang in Singapore |
| 1987 | Seminar for Keningau Chinese community by Fr Felix Chung Sept 15-16 |
| 1988 | 8th PAX youth assembly Sept 15-18 |
| 1994 | 22nd PAX Assembly: One Diocese One Family One Mission: Planning & Pastoring Together facilitated by Fr Peter Kim sj Sept 15-18 |
| 1996 | Groundbreaking ceremony of Ladies Hostel Kg Binaong Keningau |
| 2002 | Abp Bernardini meets 144 parish delegates SHPC |
| 15 people receive “Anugerah Pelayan Setia” (Faithful Servant Award) from Bp Lee during SJD Dinner, Sutera Magellan Resort & Spa KK | |
| 2003 | Media talk by Augustine Loorthusamy SHPC |
| 2016 | Youth Jubilee of Mercy, St Simon Educational Complex Likas Sept 15-17 |
Sept 16
| 1972 | Visit of Secretary-General Abp Sergio Pignedoli of the Congregation for the Evangelisation of Peoples Sept 16-18 |
| 1982 | Bp Fung receives “datukship” from TYT Tun Datuk Haji Mohd Adnan Robert |
| 1989 | Fr Francis Tsen receives ASDK Award from TYT Tun Dtk Hj Mohd Said Keruak |
| 1990 | Br Charles O’Leary fsc, OKK Victor Awit & Thasius Joeman receive “datukship” from TYT Tun Dtk Hj Mohd Said Keruak while Fr T Makajil and Albert Thien receive ASDK Award |
| 1993 | Fr John Tsung receives ASDK Award from TYT Tun Dtk Hj Mohd Said Keruak |
| 1995 | Fr Aloysius Tung receives ADK Award from TYT Tun Dtk Seri Panglima Hj Sakaran bin Dandai |
| 1996 | Bp Piong receives “datukship” from TYT Tun Dtk Seri Panglima Hj Sakaran bin Dandai |
| 1997 | Joseph Leong receives “datukship” from TYT Tun Dtk Seri Panglima Hj Sakaran bin Dandai while John Ng receives ASDK Award |
| Launching of DOPP at SHC | |
| 2002 | Concluding SJD Eucharistic Celebration SHPC |
| 2003 | Priestly ordination of Deacon Francis Dakun by Bp Piong Toboh Tambunan |
| 2004 | Priestly ordination of Deacon Jasey Gabuk by Bp Lee |
| 2009 | Priestly ordination of Deacon Rayner Bisius by Abp Lee |
Sept 17
| 2001 | Launching of KK SJD Poster/Logo by Bp Lee BTRC |
| 2007 | Death of Br John Hoekstra mhm |
Sept 18
| 2016 | SHC organises Mid-Autumn Festival Celebration SHPC |
Sept 19
| 1983 | Seminar for YS-ITM students KK Seminary Sept 19-21 |
| 1993 | Fr Pierre Barthoulot mep (former rector of Singapore Minor seminary) celebrates golden jubilee with his former students SHC |
| 1995 | Course on challenges facing religious in Asia Today Sept 19-20 CDC |
| 2003 | Death of Sr Mary Joseph (Helen) Yong ocd, 83 |
| 2016 | 3rd Sabah Women Conference Sandakan Sept 19-23 |
Sept 20
| 1977 | Death of Fr John Baptist Yong Li Chong |
| 1981 | Labuan youth Mass |
| 1985 | Inaugural young singles camp conducted by LJCCC, BTRC Sept 20-22 |
Sept 21
| 1987 | Natural Family Planning talks by Sr Rosalind Chan fmm at SHPH |
| 2002 | Dialogue session between Education Commission & Kudat educators |
| 2003 | Environmental talks by Fr Nicholas Ong & Dr Beth Baikan SHPC |
| 2009 | Priestly ordination of Deacon Isidore Gilbert Gondilou by Abp Lee |
Sept 22
| 1972 | Bp Chung appoints Fr Thomas Sham as vicar general |
| 1974 | Priestly ordination of Deacon Lucas Ho CSsR of Labuan in Singapore |
| 1987 | Seven Secular Franciscans make final profession while seven make first profession before Bp Lee SHC |
| Natural Family Planning by Sr Rosalind Chan fmm in Penampang | |
| 1991 | Children’s Liturgy of the World starts in SHC |
| 1995 | BM course on lay participation in Church’s mission Sept 22-24 BTRC |
Sept 23
| 1983 | Blessing of new La Salle School Hall Tg Aru by Bp Fung |
| 2016 | Death of first Sabahan Jesuit Fr Peter Kim Se Mang sj, Petaling Jaya |
| 2018 | Penang hosts Malaysian Bishops Conference Sept 23-26 |
Sept 24
| 1947 | Sacred Heart [Primary] School registers formally with Education Dept |
| 1982 | Seminar for parents Tg Aru Sept 24-25 |
| 1998 | Release of Bp Lee’s pastoral letter on “La Nina” |
| 2016 | Jubilee for Catechists. 327 catechists receive certificates of appreciation from Abp Wong. |
Sept 25
| 1971 | Formation of Papar Central Youth Council under Fr Goedhart |
| 1976 | 5th PAX Assembly Sept 25-26 KK Seminary |
| 1992 | CWL Diocesan Coordinating Committee upgraded to a commission |
| 1993 | Death of Fr John Tsung Huae Jang |
| 1997 | Formation of KK catechetical commission team |
Sept 26
| 1954 | Priestly ordination of Deacon Peter Chung Hoan Ting in Kuching |
| 1972 | Formation of CWL Tawau |
| 1988 | Formation of LJCCC Kadazan Unit |
| 1993 | Silver jubilee of CWL Tg Aru |
Sept 27
| 1925 | Death of Fr Francis Duxneuner mhm |
| 1986 | Seminar for Tawau Chinese-speaking Sunday School teachers by Stella Yong Sept 27-28 |
Sept 28
| 1985 | Blessing of new SFX Primary School Keningau by Fr William vd Salm mhm |
Sept 29
| 1881 | Fr Daniel Kilty settles in Papar while Msgr Jackson settles in Labuan |
| 1975 | Fr Simon Fung of Sandakan appointed by Pope Paul VI as Vicar Apostolic |
| 1983 | Silver jubilee of Sr M Michael fsic |
| 1994 | Keningau catechists conference Sept 29 – Oct 1 KSFX |
Sept 30
| 2018 | Penampang hosts Archdiocesan World Migrant Day |