Observation schedules before FY2003 are available here

● Schedule in the first half of FY 2003
　 April , May , June , July , August , September

●Schedule in the second half of FY 2003
　 October , November , December , January , February , March

●Schedule in the first half of fiscal 2004
　 April , May , June , July , August , September

● Schedule in the second half of FY 2004
　 October , November , December , January , February , March

● Schedule in the first half of FY 2005
　 April , May , June , July , August , September

●Schedule in the second half of FY 2005
　 October , November , December , January , February , March

●Schedule in the first half of FY 2006
　 From April to September (PDF File)

●Schedule in the second half of FY 2006
　 From October to March (PDF File)

●Schedule in the first half of FY 2007
　 From April to September (PDF File)
　 April , May , June , July , August , September

●Schedule in the second half of FY 2007
　 From October to March (PDF File)

● Schedule in the first half of FY 2008
　 From April to September (PDF File)

● Schedule in the second half of FY 2008
　 From October to March (PDF File)

●Schedule in the first half of FY 2009
　 From April to September (PDF File)

●Schedule in the second half of FY 2009
　 From October to March (PDF File)

●Schedule in first half of fiscal 2010
　 From April to September (PDF File)

●Schedule in the second half of fiscal 2010
　 From October to March (PDF File)

●Schedule in the first half of fiscal 2011
　 From April to November (PDF File)

●Schedule in the second half of fiscal 2011
　 From December to May (PDF File)

●Schedule in the first half of fiscal 2012
　 From June to November (PDF File)

●Schedule in the second half of fiscal 2012
　 From December to May (PDF File)

●Schedule in June-November 2013 (List)
　 From June to November (PDF File)

●Schedule in December 2013-May 2014 (List)
　 From December to May (PDF File)

●Schedule in June-November 2014 (List)
　 From June to November (PDF File)

●Schedule in December 2014-May 2015 (List)
　 From December to May (PDF File)

●Schedule in June-November 2015 (List)
　 From June to November (PDF File)

●Schedule in December 2015-May 2016 (List)
　 From December to May (PDF File)

●Schedule in June-November 2016 (List)
　 From June to November (PDF File)

●Schedule in December 2016-May 2017 (List)
　 From December to May (PDF File)

●Schedule in June-November 2017 (List)
　 From June to November (PDF File)

●Schedule in December 2017-May 2018 (List)
　 From December to May (PDF File)

●Schedule in June-November 2018 (List)
　 From June to November (PDF File)

●Schedule in December 2018-May 2019 (List)
　 From December to May (PDF File)

●Schedule in June-November 2019 (List)
　 From June to November (PDF File)

●Schedule in December 2019-May 2020 (List)
　 From December to May (PDF File)

●Schedule in June-November 2020 (List)
　 From June to November (PDF File)

●Schedule in December 2020-May 2021 (List)
　 From December to May (PDF File)

●Schedule in June-November 2021 (List)
　 From June to November (PDF File)

●Schedule in December 2021-May 2022 (List)
　 From December to May (PDF File)

●Schedule in June-November 2022 (List)
　 From June to November (PDF File)

●Schedule in December 2022-May 2023 (List)
　 From December to May (PDF File)

●Schedule in June-November 2023 (List)
　 From June to November (PDF File)

●Schedule in December 2023-May 2024 (List)
　 From December to May (PDF File)