SEP meaning in Month of Year ?

Answer:

What is September mean?

September is the ninth month of the year in the Julian and Gregorian calendars, the third of four months to have a length of 30 days, and the fourth of five months to have a length of fewer than 31 days. September in the Northern Hemisphere and March in the Southern Hemisphere are seasonal equivalent.

In the Northern hemisphere, the beginning of the meteorological autumn is on 1 September. In the Southern hemisphere, the beginning of the meteorological spring is on 1 September.　

September marks the beginning of the ecclesiastical year in the Eastern Orthodox Church. It is the start of the academic year in many countries of the northern hemisphere, in which children go back to school after the summer break, sometimes on the first day of the month.

September (from Latin septem, "seven") was originally the seventh of ten months in the oldest known Roman calendar, the calendar of Romulus c. 750 BC, with March (Latin Martius) the first month of the year until perhaps as late as 451 BC. After the calendar reform that added January and February to the beginning of the year, September became the ninth month but retained its name. It had 29 days until the Julian reform, which added a day.

reference

Full Form	Category
Safety and Environment Protection System	Academic & Science
Scientific Exchange Programme	Academic & Science
Science Exchange Program	Academic & Science
Student Educational Plan	Academic & Science
Special Embassy Program	Academic & Science
Science Evaluation Panel	Academic & Science
Solar Electric Propulsion	Academic & Science
Association of Polish Electrical Engineers	Academic & Science
Stowarzyszenie Elektryków Polskich	Academic & Science
Science Environmental Policy	Academic & Science
Solar Energetic Particle	Academic & Science
Science Exchange Programme	Academic & Science
Systems Engineering Process	Academic & Science
Solar Energetic Particles	Academic & Science
Student Exchange Program	Academic & Science
Solve, Educate, And Prevent	Academic & Science
Stephenville (tx)	Airport Code
Society for Exact Philosophy	Associations & Organizations
Std Life Euro	Business
Simplified Employer Pension	Business
Standards Of Effective Practice	Business
Small Experimental Project	Business
Swedish Export CR Corporation	Business
Swingline Electric Punch	Business
Strategic Excellence Position	Business
Sector Expenditure Program	Business
South End Press	Business
Separate	Chemistry
School Educational Plan	Community
Science Enrichment Preparation	Community
Science Enrichment Program	Community
Student Education Profile	Community
Summer Enrichment Program	Community
Student Educational Planner	Community
Student Educational Planning	Community
Student Education Plan	Community
Self Employed Pension	Community
Supplementary Education Program	Community
Special Effects Performance	Community
Selective Polling (T.30)	Computer and Networking
Single Entry Point	Computing
System Enhancement Package	Computing
Simple And Easy Programming	Computing
Secure Execute Processor	Computing
Single Edge Processor	Computing
Systems Engineering Plan	Computing
Signaling End Point	Computing
Separator Page	Computing
Slashdot Effect Protection	Computing
Secure Entry Point	Computing
Search Engine Positioning	Computing
Spanning Explorer Packet	Computing
Symantec Endpoint Protection	Computing
Symantec Enterprise Protection	Computing
Service Execution Platform	Computing
Search Engine Poisoning	Computing
Secure Exchange Protocol	Computing
Santa Elena Peninsula	Earth Science
Software Engineering Process	Electronics
Printer Separator Page	File Type
Stanford Encyclopedia of Philosophy	General
Stanford Exploration Project	General
Summer Entrepreneurship Program	General
Saturday Enrichment Program	General
Stakeholder Enterprise Portal	General
SomatoSensory Evoked Potentials	General
Suzuki Eco Performance	General
Simulcast Edge Processor	General
Saturday Enrichment Programs	General
Site Engagement Program	General
Service Extremely Professional	General
Special Enrollment Periods	General
SBOL Enhancement Proposal	General
SunPy Enhancement Proposal	General
Selsius Ethernet Phone	General
Special Emphasis Panel	General
Smart Energy Profile	General
Separator	General
South East Panteras	General
Screamin Eagle Performance	General
Surface Extension Project	Governmental
Spectra Energy Partners	Governmental
State Energy Program	Governmental
Superior Energy Performance	Governmental
Science and Environmental Policy	Governmental
Supplemental Environmental Projects	Governmental
Strategic Enforcement Plan	Governmental
Supplemental Environmental Project	Governmental
Somebody Else's Problem	Governmental
Special Executive Protection	Governmental
Some Evil Powers	Governmental
Socialist Equality Party	Governmental
Specialna Enota Policije	Governmental
Social Equality Party	Governmental
Single Exit Price	Governmental
SODPUR	Indian Railway Station
Sozialistiche EinheitsPartei	International
Secretaría de Educación Pública	International
Search Engine Promotion	Internet
Somebody Else Problem	Internet
Someone Else's Problem	Internet
Simplified Employee Pension	Jobs
Simplified Employee Plan	Jobs
Surrogate Employer Programme	Jobs
Self-employed Professional	Jobs
Strong Error Percentage	Maths
Spherical Error Probability	Maths
Smallpox Eradication Program	Medical
Salmonid Enhancement Program	Medical
Somatosensory Evoked Potential	Medical
Sclerosing Encapsulating Peritonitis	Medical
Self-Evaluation Process	Medical
Standard Essential Patent	Messaging
Synthetic Environment Program	Military and Defence
Signal Entry Panel	Military and Defence
Soldier Enhancement Program	Military and Defence
Signal Entrance Panel	Military and Defence
Spherical Error Probable	Military and Defence
Special Emphasis Program	Military and Defence
System Evaluation Plan	Military and Defence
September	Month of Year
Scalable Encryption Processor	Networking
Scottish Equity Partners	Regional
Startup Europe Partnership	Regional
Software Engineering Professionals	Softwares
Source Evaluation Panel	Space Science
Support Electronics Package	Space Science
Support Equipment Package	Space Science
Separation	Space Science
Sports Entertainment Package	Sports
Clark Field Airport	Transport & Travel