diff --git a/SAMPLing_instructions.md b/SAMPLing_instructions.md
index 5544787d..0b7932df 100644
--- a/SAMPLing_instructions.md
+++ b/SAMPLing_instructions.md
@@ -1,7 +1,7 @@
 # SAMPLing Challenge Instructions
 
 ## Due date
-Your predictions must be uploaded on the [D3R SAMPL6 web-page](https://drugdesigndata.org/about/sampl6) by January 12, 2018.
+Your predictions must be uploaded on the [D3R SAMPL6 web-page](https://drugdesigndata.org/about/sampl6) by January 19, 2018.
 Templates for the submission of the prediction data are provided at
 [`host_guest/SAMPLing/absolute_submission_example.txt`](host_guest/SAMPLing/absolute_submission_example.txt) and
 [`host_guest/SAMPLing/relative_submission_example.txt`](host_guest/SAMPLing/relative_submission_example.txt).
diff --git a/host_guest_instructions.md b/host_guest_instructions.md
index c3646e80..12cd882d 100644
--- a/host_guest_instructions.md
+++ b/host_guest_instructions.md
@@ -1,7 +1,7 @@
 # SAMPL6 Detailed Host-Guest Instructions
 
 ## Due date
-Your predictions must be uploaded on the D3R SAMPL5 web-page by January 12, 2018.
+Your predictions must be uploaded on the D3R SAMPL5 web-page by January 19, 2018.
 The experimental results will be released immediately after the challenge closes.
 You must use the provided template to upload your predictions to the [SAMPL website](https://drugdesigndata.org/about/sampl6).
 A draft template (example) is available for each of the host-guest systems; it is placed in the relevant directory and labeled by the host name; ([host_guest/CB8AndGuests/CB8.txt](host_guest/CB8AndGuests/CB8.txt), [host_guest/OctaAcidsAndGuests/OA.txt](host_guest/OctaAcidsAndGuests/OA.txt), and [host_guest/OctaAcidsAndGuests/TEMOA.txt](host_guest/OctaAcidsAndGuests/TEMOA.txt)).