{"id":5853,"date":"2007-03-08T16:01:00","date_gmt":"2007-03-08T16:01:00","guid":{"rendered":"https:\/\/blogs.msdn.microsoft.com\/vcblog\/2007\/03\/08\/usa-daylight-savings-time-dst-update\/"},"modified":"2019-02-18T18:54:34","modified_gmt":"2019-02-18T18:54:34","slug":"usa-daylight-savings-time-dst-update","status":"publish","type":"post","link":"https:\/\/devblogs.microsoft.com\/cppblog\/usa-daylight-savings-time-dst-update\/","title":{"rendered":"USA Daylight Savings Time (DST) Update"},"content":{"rendered":"

<\/p>\n

Starting from March 2007, the Daylight Savings Time (DST) start date and end date for the United States will change. DST will start at 2:00 A.M. on the second Sunday in March and end at 2:00 A.M on the first Sunday in November.<\/p>\n

<\/span><\/p>\n

The C Run-Time (CRT) performs its own time handling only when the TZ environment variable is set, or when an underlying OS API time call fails.  <\/span>If the TZ environment variably is not set, the CRT calls the Windows APIs and exhibits Windows behavior. Windows Updates<\/span><\/a> are available which allow Windows to correctly calculate time based on the new DST rules. CRT Updates<\/span><\/a> are available for the CRTs which ship with every currently supported version of Visual Studio<\/b> and  <\/span>CRT updates<\/span><\/a> are also available for the CRT which ships with Windows<\/b> to continue to correctly handle DST conversions in U.S. time zones based on the new DST rules.<\/p>\n

<\/span><\/p>\n

Get more information on Preparing for Daylight Saving Time changes in 2007<\/span><\/a><\/span><\/span><\/p>\n

<\/span><\/h2>\n

Get more information on How to handle dates and times that include DST<\/span><\/a><\/span><\/span><\/p>\n

<\/span><\/p>\n

Thanks,<\/span><\/span><\/p>\n

<\/span><\/p>\n

Sarita Bafna<\/span><\/span> – Visual C++ Team<\/span><\/span><\/p>\n

<\/span><\/p>\n

<\/font><\/span><\/span><\/span><\/span><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

Starting from March 2007, the Daylight Savings Time (DST) start date and end date for the United States will change. DST will start at 2:00 A.M. on the second Sunday in March and end at 2:00 A.M on the first Sunday in November. The C Run-Time (CRT) performs its own time handling only when the […]<\/p>\n","protected":false},"author":289,"featured_media":35994,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-5853","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cplusplus"],"acf":[],"blog_post_summary":"

Starting from March 2007, the Daylight Savings Time (DST) start date and end date for the United States will change. DST will start at 2:00 A.M. on the second Sunday in March and end at 2:00 A.M on the first Sunday in November. The C Run-Time (CRT) performs its own time handling only when the […]<\/p>\n","_links":{"self":[{"href":"https:\/\/devblogs.microsoft.com\/cppblog\/wp-json\/wp\/v2\/posts\/5853","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/devblogs.microsoft.com\/cppblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/devblogs.microsoft.com\/cppblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/cppblog\/wp-json\/wp\/v2\/users\/289"}],"replies":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/cppblog\/wp-json\/wp\/v2\/comments?post=5853"}],"version-history":[{"count":0,"href":"https:\/\/devblogs.microsoft.com\/cppblog\/wp-json\/wp\/v2\/posts\/5853\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/cppblog\/wp-json\/wp\/v2\/media\/35994"}],"wp:attachment":[{"href":"https:\/\/devblogs.microsoft.com\/cppblog\/wp-json\/wp\/v2\/media?parent=5853"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/cppblog\/wp-json\/wp\/v2\/categories?post=5853"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/cppblog\/wp-json\/wp\/v2\/tags?post=5853"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}