diff --git a/nixos/tests/scion/freestanding-deployment/bootstrap.sh b/nixos/tests/scion/freestanding-deployment/bootstrap.sh
index 3e2f7da07443..5ecf9f54d312 100644
--- a/nixos/tests/scion/freestanding-deployment/bootstrap.sh
+++ b/nixos/tests/scion/freestanding-deployment/bootstrap.sh
@@ -5,18 +5,18 @@ mkdir AS{1..5}
 
 # Create voting and root keys and (self-signed) certificates for core ASes
 pushd AS1
-scion-pki certificate create --not-after=3650d --profile=sensitive-voting <(echo '{"isd_as": "42-ffaa:1:1", "common_name": "42-ffaa:1:1 sensitive voting cert"}') sensitive-voting.pem sensitive-voting.key
-scion-pki certificate create --not-after=3650d --profile=regular-voting <(echo '{"isd_as": "42-ffaa:1:1", "common_name": "42-ffaa:1:1 regular voting cert"}') regular-voting.pem regular-voting.key
-scion-pki certificate create --not-after=3650d --profile=cp-root <(echo '{"isd_as": "42-ffaa:1:1", "common_name": "42-ffaa:1:1 cp root cert"}') cp-root.pem cp-root.key
+scion-pki certificate create --not-before="1970-01-01T00:00:00Z" --not-after="2124-11-02T15:41:22Z" --profile=sensitive-voting <(echo '{"isd_as": "42-ffaa:1:1", "common_name": "42-ffaa:1:1 sensitive voting cert"}') sensitive-voting.pem sensitive-voting.key
+scion-pki certificate create --not-before="1970-01-01T00:00:00Z" --not-after="2124-11-02T15:41:22Z" --profile=regular-voting <(echo '{"isd_as": "42-ffaa:1:1", "common_name": "42-ffaa:1:1 regular voting cert"}') regular-voting.pem regular-voting.key
+scion-pki certificate create --not-before="1970-01-01T00:00:00Z" --not-after="2124-11-02T15:41:22Z" --profile=cp-root <(echo '{"isd_as": "42-ffaa:1:1", "common_name": "42-ffaa:1:1 cp root cert"}') cp-root.pem cp-root.key
 popd
 
 pushd AS2
-scion-pki certificate create --not-after=3650d --profile=cp-root <(echo '{"isd_as": "42-ffaa:1:2", "common_name": "42-ffaa:1:2 cp root cert"}') cp-root.pem cp-root.key
+scion-pki certificate create --not-before="1970-01-01T00:00:00Z" --not-after="2124-11-02T15:41:22Z" --profile=cp-root <(echo '{"isd_as": "42-ffaa:1:2", "common_name": "42-ffaa:1:2 cp root cert"}') cp-root.pem cp-root.key
 popd
 
 pushd AS3
-scion-pki certificate create --not-after=3650d --profile=sensitive-voting <(echo '{"isd_as": "42-ffaa:1:3", "common_name": "42-ffaa:1:3 sensitive voting cert"}') sensitive-voting.pem sensitive-voting.key
-scion-pki certificate create --not-after=3650d --profile=regular-voting <(echo '{"isd_as": "42-ffaa:1:3", "common_name": "42-ffaa:1:3 regular voting cert"}') regular-voting.pem regular-voting.key
+scion-pki certificate create --not-before="1970-01-01T00:00:00Z" --not-after="2124-11-02T15:41:22Z" --profile=sensitive-voting <(echo '{"isd_as": "42-ffaa:1:3", "common_name": "42-ffaa:1:3 sensitive voting cert"}') sensitive-voting.pem sensitive-voting.key
+scion-pki certificate create --not-before="1970-01-01T00:00:00Z" --not-after="2124-11-02T15:41:22Z" --profile=regular-voting <(echo '{"isd_as": "42-ffaa:1:3", "common_name": "42-ffaa:1:3 regular voting cert"}') regular-voting.pem regular-voting.key
 popd
 
 # Create the TRC (Trust Root Configuration)
@@ -33,8 +33,8 @@ authoritative_ases = ["ffaa:1:1", "ffaa:1:2", "ffaa:1:3"]
 cert_files = ["AS1/sensitive-voting.pem", "AS1/regular-voting.pem", "AS1/cp-root.pem", "AS2/cp-root.pem", "AS3/sensitive-voting.pem", "AS3/regular-voting.pem"]
 
 [validity]
-not_before = '$(date +%s)'
-validity = "365d"' \
+not_before = '0'
+validity = "36500d"' \
 > trc-B1-S1-pld.tmpl
 
 scion-pki trc payload --out=tmp/ISD42-B1-S1.pld.der --template trc-B1-S1-pld.tmpl
@@ -51,18 +51,18 @@ rm tmp -r
 
 # Create CA key and certificate for issuing ASes
 pushd AS1
-scion-pki certificate create --profile=cp-ca <(echo '{"isd_as": "42-ffaa:1:1", "common_name": "42-ffaa:1:1 CA cert"}') cp-ca.pem cp-ca.key --ca cp-root.pem --ca-key cp-root.key
+scion-pki certificate create --not-before="1970-01-01T00:00:00Z" --not-after="2124-11-02T15:41:22Z" --profile=cp-ca <(echo '{"isd_as": "42-ffaa:1:1", "common_name": "42-ffaa:1:1 CA cert"}') cp-ca.pem cp-ca.key --ca cp-root.pem --ca-key cp-root.key
 popd
 pushd AS2
-scion-pki certificate create --profile=cp-ca <(echo '{"isd_as": "42-ffaa:1:2", "common_name": "42-ffaa:1:2 CA cert"}') cp-ca.pem cp-ca.key --ca cp-root.pem --ca-key cp-root.key
+scion-pki certificate create --not-before="1970-01-01T00:00:00Z" --not-after="2124-11-02T15:41:22Z" --profile=cp-ca <(echo '{"isd_as": "42-ffaa:1:2", "common_name": "42-ffaa:1:2 CA cert"}') cp-ca.pem cp-ca.key --ca cp-root.pem --ca-key cp-root.key
 popd
 
 # Create AS key and certificate chains
-scion-pki certificate create --profile=cp-as <(echo '{"isd_as": "42-ffaa:1:1", "common_name": "42-ffaa:1:1 AS cert"}') AS1/cp-as.pem AS1/cp-as.key --ca AS1/cp-ca.pem --ca-key AS1/cp-ca.key --bundle
-scion-pki certificate create --profile=cp-as <(echo '{"isd_as": "42-ffaa:1:2", "common_name": "42-ffaa:1:2 AS cert"}') AS2/cp-as.pem AS2/cp-as.key --ca AS2/cp-ca.pem --ca-key AS2/cp-ca.key --bundle
-scion-pki certificate create --profile=cp-as <(echo '{"isd_as": "42-ffaa:1:3", "common_name": "42-ffaa:1:3 AS cert"}') AS3/cp-as.pem AS3/cp-as.key --ca AS1/cp-ca.pem --ca-key AS1/cp-ca.key --bundle
-scion-pki certificate create --profile=cp-as <(echo '{"isd_as": "42-ffaa:1:4", "common_name": "42-ffaa:1:4 AS cert"}') AS4/cp-as.pem AS4/cp-as.key --ca AS1/cp-ca.pem --ca-key AS1/cp-ca.key --bundle
-scion-pki certificate create --profile=cp-as <(echo '{"isd_as": "42-ffaa:1:5", "common_name": "42-ffaa:1:5 AS cert"}') AS5/cp-as.pem AS5/cp-as.key --ca AS2/cp-ca.pem --ca-key AS2/cp-ca.key --bundle
+scion-pki certificate create --not-before="1970-01-01T00:00:00Z" --not-after="2124-11-02T15:41:22Z" --profile=cp-as <(echo '{"isd_as": "42-ffaa:1:1", "common_name": "42-ffaa:1:1 AS cert"}') AS1/cp-as.pem AS1/cp-as.key --ca AS1/cp-ca.pem --ca-key AS1/cp-ca.key --bundle
+scion-pki certificate create --not-before="1970-01-01T00:00:00Z" --not-after="2124-11-02T15:41:22Z" --profile=cp-as <(echo '{"isd_as": "42-ffaa:1:2", "common_name": "42-ffaa:1:2 AS cert"}') AS2/cp-as.pem AS2/cp-as.key --ca AS2/cp-ca.pem --ca-key AS2/cp-ca.key --bundle
+scion-pki certificate create --not-before="1970-01-01T00:00:00Z" --not-after="2124-11-02T15:41:22Z" --profile=cp-as <(echo '{"isd_as": "42-ffaa:1:3", "common_name": "42-ffaa:1:3 AS cert"}') AS3/cp-as.pem AS3/cp-as.key --ca AS1/cp-ca.pem --ca-key AS1/cp-ca.key --bundle
+scion-pki certificate create --not-before="1970-01-01T00:00:00Z" --not-after="2124-11-02T15:41:22Z" --profile=cp-as <(echo '{"isd_as": "42-ffaa:1:4", "common_name": "42-ffaa:1:4 AS cert"}') AS4/cp-as.pem AS4/cp-as.key --ca AS1/cp-ca.pem --ca-key AS1/cp-ca.key --bundle
+scion-pki certificate create --not-before="1970-01-01T00:00:00Z" --not-after="2124-11-02T15:41:22Z" --profile=cp-as <(echo '{"isd_as": "42-ffaa:1:5", "common_name": "42-ffaa:1:5 AS cert"}') AS5/cp-as.pem AS5/cp-as.key --ca AS2/cp-ca.pem --ca-key AS2/cp-ca.key --bundle
 
 for i in {1..5}
 do