diff --git a/doc/ChangeLog b/doc/ChangeLog
index 746fead140..7fb8dacc70 100644
--- a/doc/ChangeLog
+++ b/doc/ChangeLog
@@ -1,5 +1,74 @@
 ===============================================================
 
+Tag name: cam6_4_048
+Originator(s): jedwards4b, peverwhee
+Date: 20 December 2024
+One-line Summary: Timestamp in rpointer name
+Github PR URL: https://github.com/ESCOMP/CAM/pull/1147
+
+Purpose of changes (include the issue number and title text for each relevant GitHub issue):
+#1146 - Add timestep to rpointer file name
+- Updates to externals, nuopc cap, and cam control code to handle timestamp in
+rpointer file
+
+Describe any changes made to build system: N/A
+
+Describe any changes made to the namelist: N/A
+
+List any changes to the defaults for the boundary datasets: N/A
+
+Describe any substantial timing or memory changes: N/A
+
+Code reviewed by: brian-eaton
+
+List all files eliminated: N/A
+
+List all files added and what they do: N/A
+
+List all existing files that have been modified, and describe the changes:
+M  .gitmodules
+- update cmeps, cdeps, cime, share, clm externals
+
+M  src/control/cam_initfiles.F90
+- look for new timestamped rpointer file
+
+M  src/control/cam_restart.F90
+- remove unnecessary conditionals for optional variables
+
+M src/cpl/nuopc/atm_comp_nuopc.F90
+- update variable names coming from coupler
+
+If there were any failures reported from running test_driver.sh on any test
+platform, and checkin with these failures has been OK'd by the gatekeeper,
+then copy the lines from the td.*.status files for the failed tests to the
+appropriate machine below.  All failed tests must be justified.
+
+derecho/intel/aux_cam:
+
+SMS_D_Ln9.f19_f19_mg17.FXHIST.derecho_intel.cam-outfrq9s_amie (Overall: FAIL)
+SMS_D_Ln9_P1280x1.ne0CONUSne30x8_ne0CONUSne30x8_mt12.FCHIST.derecho_intel.cam-outfrq9s (Overall: FAIL)
+ - pre-existing failures due to build-namelist error requiring CLM/CTSM external update.
+
+ERP_Ln9.f09_f09_mg17.FCSD_HCO.derecho_intel.cam-outfrq9s (Overall: FAIL)
+SMS_Ld1.f09_f09_mg17.FCHIST_GC.derecho_intel.cam-outfrq1d (Overall: DIFF)
+ - pre-existing failure due to HEMCO not having reproducible results issues #1018 and #856
+
+derecho/nvhpc/aux_cam:
+
+izumi/nag/aux_cam:
+
+DAE.f45_f45_mg37.FHS94.izumi_nag.cam-dae (Overall: FAIL)
+ - pre-existing failure -- issue #670
+
+izumi/gnu/aux_cam:
+
+CAM tag used for the baseline comparison tests if different than previous
+tag:
+
+Summarize any changes to answers:
+
+===============================================================
+
 Tag name: cam6_4_047
 Originator(s): jedwards4b, fvitt
 Date: 19 November 2024