1# FEATURE: CONFIG_FEATURE_TIMEZONE
2
3# 'Z' is UTC
4dt=$(TZ=UTC0 busybox date -d '1999-1-2 3:4:5Z')
5dt=$(echo "$dt" | cut -b1-19)
6test x"$dt" = x"Sat Jan  2 03:04:05"
7
8# '+0600' is six hours ahead of UTC
9dt=$(TZ=UTC0 busybox date -d '1999-1-2 3:4:5 +0600')
10dt=$(echo "$dt" | cut -b1-19)
11test x"$dt" = x"Fri Jan  1 21:04:05"
12
13# '-0600' is six hours behind UTC
14dt=$(TZ=UTC0 busybox date -d '1999-1-2 3:4:5 -0600')
15dt=$(echo "$dt" | cut -b1-19)
16test x"$dt" = x"Sat Jan  2 09:04:05"
17
18# before dst is switched on
19dt=$(TZ=GMT0BST,M3.5.0/1,M10.5.0/2 busybox date -d '2021-03-28 00:59:59 +0000')
20test x"$dt" = x"Sun Mar 28 00:59:59 GMT 2021"
21
22# after dst is switched on
23dt=$(TZ=GMT0BST,M3.5.0/1,M10.5.0/2 busybox date -d '2021-03-28 01:00:01 +0000')
24test x"$dt" = x"Sun Mar 28 02:00:01 BST 2021"
25
26# before dst is switched off
27dt=$(TZ=GMT0BST,M3.5.0/1,M10.5.0/2 busybox date -d '2021-10-31 00:00:01 +0000')
28test x"$dt" = x"Sun Oct 31 01:00:01 BST 2021"
29
30# after dst is switched off: back to 01:00:01 but with different TZ
31dt=$(TZ=GMT0BST,M3.5.0/1,M10.5.0/2 busybox date -d '2021-10-31 01:00:01 +0000')
32test x"$dt" = x"Sun Oct 31 01:00:01 GMT 2021"
33