Government Shutdown - application deadlines for fellowships and grants

For the National Science Foundation (NSF)

If your grant or fellowship is funded by the NSF, then the deadline remains the same.

From the NSF page, https://www.nsf.gov/shutdown/grantees.jsp, Information About the Government Shutdown for NSF Proposers and Grantees:

Impact on Existing Deadlines

During a lapse in appropriations, NSF will continue to accept proposal submissions pursuant to existing deadlines.

You should read this as "they will accept your proposal, will not process it, and the dead-line remains unchanged" during the shutdown.

You will not get any answer to your email during the shutdown. Quoting the same page:

Responses to any inquiries received regarding upcoming deadlines, including proposal preparation, will be deferred until normal operations resume.

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Update

https://www.nsf.gov/ says:

With the enactment of continuing appropriations through February 15, 2019, NSF is working to resume operations. Employees should report to work on their next scheduled work day. For most staff, that will be Monday, January 28, 2019. NSF headquarters will be open to all staff starting at 6:00 a.m. Monday, January 28, 2019.