Mauritius switches to summer time this Sunday. At 2am, it will be 3am. There will be 10 hours of difference between EDT and MUST. Here, we are switching to EDT a week after (Sunday 2nd Nov).
All systems should use UTC for time keeping purposes. You can then convert back to local time when needed.
# zdump -v /usr/share/zoneinfo/Indian/Mauritius
/usr/share/zoneinfo/Indian/Mauritius Fri Dec 13 20:45:52 1901 UTC = Sat Dec 14 00:35:52 1901 MUT isdst=0 gmtoff=13800
/usr/share/zoneinfo/Indian/Mauritius Sat Dec 14 20:45:52 1901 UTC = Sun Dec 15 00:35:52 1901 MUT isdst=0 gmtoff=13800
/usr/share/zoneinfo/Indian/Mauritius Mon Dec 31 20:09:59 1906 UTC = Mon Dec 31 23:59:59 1906 MUT isdst=0 gmtoff=13800
/usr/share/zoneinfo/Indian/Mauritius Mon Dec 31 20:10:00 1906 UTC = Tue Jan 1 00:10:00 1907 MUT isdst=0 gmtoff=14400
/usr/share/zoneinfo/Indian/Mauritius Sat Oct 9 19:59:59 1982 UTC = Sat Oct 9 23:59:59 1982 MUT isdst=0 gmtoff=14400
/usr/share/zoneinfo/Indian/Mauritius Sat Oct 9 20:00:00 1982 UTC = Sun Oct 10 01:00:00 1982 MUST isdst=1 gmtoff=18000
/usr/share/zoneinfo/Indian/Mauritius Sun Mar 20 18:59:59 1983 UTC = Sun Mar 20 23:59:59 1983 MUST isdst=1 gmtoff=18000
/usr/share/zoneinfo/Indian/Mauritius Sun Mar 20 19:00:00 1983 UTC = Sun Mar 20 23:00:00 1983 MUT isdst=0 gmtoff=14400
/usr/share/zoneinfo/Indian/Mauritius Sat Oct 25 21:59:59 2008 UTC = Sun Oct 26 01:59:59 2008 MUT isdst=0 gmtoff=14400
/usr/share/zoneinfo/Indian/Mauritius Sat Oct 25 22:00:00 2008 UTC = Sun Oct 26 03:00:00 2008 MUST isdst=1 gmtoff=18000
/usr/share/zoneinfo/Indian/Mauritius Thu Mar 26 21:59:59 2009 UTC = Fri Mar 27 02:59:59 2009 MUST isdst=1 gmtoff=18000
/usr/share/zoneinfo/Indian/Mauritius Thu Mar 26 22:00:00 2009 UTC = Fri Mar 27 02:00:00 2009 MUT isdst=0 gmtoff=14400
/usr/share/zoneinfo/Indian/Mauritius Mon Jan 18 03:14:07 2038 UTC = Mon Jan 18 07:14:07 2038 MUT isdst=0 gmtoff=14400
/usr/share/zoneinfo/Indian/Mauritius Tue Jan 19 03:14:07 2038 UTC = Tue Jan 19 07:14:07 2038 MUT isdst=0 gmtoff=14400