Talk:DST in Australia

A quick analysis of relative offsets (and the 9-5 business hours) of Silicon Valley (PST/PDT), New York (EST/EDT), London (UTC/BST) and Australia (AWST, AEST/AEDT)

PST:    [67890123*123456789012345]  -0800
PST:    [+................+++++++]
PDT:    [7890123*1234567890123456]  -0700
PDT:    [................++++++++]

EST:    [90123*123456789012345678]  -0500
EST:    [..............++++++++..]
EDT:    [0123*1234567890123456789]  -0400
EDT:    [.............++++++++...]


UTC:    [*12345678901234567890123]
UTC:    [.........++++++++.......]
BST:    [12345678901234567890123*]  +0100
BST:    [........++++++++........]


AWST:   [8901234567890123*1234567]  +800
AWST:   [.++++++++...............]

AEST:   [01234567890123*123456789]  +1000
AEST:   [+++++++................+]
AEDT:   [1234567890123*1234567890]  +1100
AEDT:   [++++++................++]

So, compared to PST/PDT, EST/EDT, and UTC; AWST is completely non-overlapping. (in fact, PST/UTC/AWST are all mutually exclusicve for 9-5 overlaps). AEST and EST/EDT have no overlap either.

• AWST and BST have 1 overlapping hour.

• AEST and PDT have 1 overlapping hour.
• AEST and PST have 2 overlapping hours. (as does AEDT and PDT)
• AEDT and PST have 3 overlapping hours.