diff --git a/lib/ulib/base b/lib/ulib/base
index 81b026c..c4299bc 100644
--- a/lib/ulib/base
+++ b/lib/ulib/base
@@ -393,7 +393,9 @@ function parse_date() {
     local value="$1" type="${2:-date}"
     local now="$(awk 'BEGIN { print mktime(strftime("%Y %m %d 00 00 00 +0400")) }')"
     case "$value" in
+    =*) value="${value#=}";;
     +*) value="$(($now + ${value#+} * 86400))";;
+    -*) value="$(($now - ${value#-} * 86400))";;
     *) value="$(<<<"$value" awk -F/ '{
         nd = strftime("%d"); nm = strftime("%m"); ny = strftime("%Y")
         d = $1 + 0; if (d < 1) d = nd;
@@ -407,6 +409,7 @@ function parse_date() {
     d|date) awk '{ print strftime("%d/%m/%Y", $0 + 0) }' <<<"$value";;
     l|ldap) awk '{ print strftime("%Y%m%d%H%M%S+0400", $0 + 0) }' <<<"$value";;
     m|mysql) awk '{ print strftime("%Y-%m-%d", $0 + 0) }' <<<"$value";;
+    t|ts|timestamp) echo "$value";;
     *) recho "$value";;
     esac
 }